Yes!
The only DLC that isn’t worth getting is the Resistance Warriors Pack because the cosmetics are honestly subpar and most mods do better.
With the start of a dedicated playing XCOM 2 thread and having now put in wayyyyy too much time into this game I think now would be a good time for me to just basically knowledge dump things that do not spoil the game.
It is a collection of mods to basically smooth out the rough parts of the game such as UI and bugs. These are also mods I consider
essential and use on every single playthrough.
Info you should know
There is actually an indicator if an action will end your turn that almost no one knows about

If you see >| that is a turn ending move.
You should be careful about the Avatar Project progress but you shouldn’t be deathly afraid of it. In the event that it does get filled the game has a safety net mechanic that gives you a chance to climb out of the hole.
Smoke grenades apply their effect to both friendlies and enemies but flashbangs only affect enemies.
Do not be afraid to use explosives to destroy cover.
Mutons can counter melee attacks including those of a templar.
Here is how cover works
What if I don't like really long campaigns but still like the battle gameplay?
Good news you have a few options now!
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Skirmishes: These are one off customized tactical operations. Real fun if you just want to get a quick battle in or just try something silly like an all Templar squad
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Legacy Operations: These are kind of roguelike runs where you start with a small squad and gain more units and tech over the course of 7 missions. Comes with 4 premade ones that have a story but you can also generate your own
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Daily Challenge: A new challenge every day for you to try and get a high score on.
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Challenge Archive: These were some of the daily challenges they had in rotation all now in one place for you to try as many times as you want.
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WaveCome: This is a mod that turns the game into a wave survival. Pretty fun, if you are starting to notice a slow down after several waves press escape and look for the “Change Location” button to move your squad to a new map and reset buildings.
Mods
As a forward when using mods you should expect the need to start a new campaign in most cases in order for them to take effect. Mods do not disable achievements if that is a concern of yours.
Cosmetic
Unrestricted Customization

This is IMO a must have mod as it allows you to fully customize your soldier
Longer Names V2
Lets you bump name length to 30 characters (or more if you edit the INI file)
Random Weapon Name Button
Adds a button that you can click to give your weapon a random name.
Propaganda Poster Pack
Adds 14 new backgrounds for your photos
Creative Xenos’ Community Pose Pack
This adds 97 new poses to the photobooth. Content Warning it does contain some “meme” ones that are offensive including some for implied suicide
Female Hair Pack
Adds 73 new hair varieties
Ketaros Tattoos Pack
60 new tattoos
XXL Tattoo
Fire Emblem Hair
Wrestler Facepaints
Ketaros Makeup Package
20 new face paints that apply makeup
Ketaros Scar Package
More Hair Colors
More Armor Colors
More Eye Colors
More Skin Colors
SliWhists Spark Customization Pack
Gundam skins for your Sparks
Dropship Propaganda Variety
Now you can hear even more of the lines
Centrals Sweater
Because it gets chilly out sometimes
Custom Face Paints
Military Camouflage Pattern
Mercenary Plasma Weapons
Quality of Life
Yet Another F1

This is the #1 mod I recommend. What this mod does is let you press F1 when you have ANY unit selected and gives you a breakdown of everything you need to know to not misplay because you did not fully understand what it was they could do.
Cost Based Ability Colors

This makes it a lot easier to tell exactly at a glance how many action points something uses.
Quick Soldier Info

Adds icons on the top right for each unit under your control and displays valuable information such as health, action points, armor, status, etc
New Target Icons

Adds more target icons for regular, WOTC and modded enemies
Misclick Confirm
Adds a confirmation pop up whenever you order a soldier to move somewhere without cover
SHOW GTS Class Counts
Shows you the current soldier count for all your classes inside the GTS as well as how many are actually ready for combat.
Smooth Scrolling

Blackmarket Usage
Displays possible useage of items on the blackmarket sell screen so you know if you can sell that corpse or not. Can be configured to hide spoilers.
Bug Fixes
Insider Knowledge Fix
Fixes a bug with stocks and laser sights not benefitting from insider knowledge
Chosen Dark Events Fix
Prevents events being created that are related to the chosen if the chosen no longer exist
Defense Matrix Sabotage Fix
The facility is supposed to lower the chance of the chosen being able to do a sabotage action but the code was never fully completed but the text remains.
Revival Protocol Fixes
Revival Protocols in game text says it can bring a soldier out of a stun, it can’t. This mod fixes that.
Loot Mind Control
Fixes a bug where killing a mind controlled alien doesn’t give you any loot. Also fixes a bug where loot carried by people who were not your dedicated soldiers (e.g. you have an event that gives you a resistance fighter) got deleted on the end of a mission.
SPARK Repair Fix
In game description for the BIT say it gets increased healing with newer models, this is a big fat lie. This mod corrects that big fat lie.
More Effective Blast Padding
Makes explosions from cars and other destructible objects (think gas tanks) be affected by blast padding.
Gameplay Mods
Augmentations
This is a really cool mod that adds a condition where if a soldier becomes gravely wounded there is a chance you have to give them an agumented body part before they can be used again. These aguments can have drastic gameplay changes like being able to use your cyber arms grappling hook.
More Traits
Adds more negative traits but also adds positive traits. The way you gain positive traits is to have a negative trait then instead of recovering from it in the infirmary you send them on a mission where they do not get injured after the mission they will then get a random positive trait and lose the negative one.
Scientist staff slots
Replaces some engineering staff slots with scientist ones to help balance out the RNG of not getting engineers for the first two months
Restored SITREPs
Restores cut SITREPs including Ambush where ADVENT will launch multiple reinforcements once XCOM completes the mission objective
Metal Over Flesh Redux
An overhaul of SPARKS that gives them more upgrades and a utility slot for things like ammo
Jetpacks
Give your units jetpacks so they can dynamically deploy mid mission and do other cool things like rocket punch an alien
A Better ____
A major mod series that changes the game extensively by modifying both the alien units, adding new units, their AI, as well as changes to player mechanics.