As someone who has been involved in performing arts for a several years now, I have to agree that I always found Peter Dinklage’s performance perfectly acceptable. Did it blow my mind? No, but not every performance does, be it in video games or movies or television. There’s some truly terrible performance work out there, and I don’t believe this falls into that category.
I, too, missed his dry delivery when they made the switch. And there were several lines I personally thought he performed better, or at least had a better read on. Especially with the somewhat elusive nature as to what the Ghosts actually are, I feel Nolan’s performance is a little too effusive (well done, without a doubt, but possibly a little uncharacteristic).