I’m on my iPhone XR. I get 60 FPS and it’s clear as day, no bluriness. As admin said, it could be due to the CPU Usage, but I don’t think an iPad 2019 would struggle with that. Some ground vehicles are slightly different, but other than that, my device runs the game exactly like before the update.
Be sure to check that there are no other apps in the background. If there is you can also turn off background app refresh in your iOS Settings