[photon]

Definitely in the eye of the beholder, none of the recastings you mention bothered me at all, while the CGI people bumps me out of the suspension of disbelief much easier.

And it's not the CGI itself, because I like animated movies and have no problem being emotionally engaged with Moana or whatever. I felt more for K-2SO in Rogue One than the actual humans even. It's the attempt at reproducing a human face, it feels like the CGI face isn't quite attached properly to the underlying actor so it moves minutely differently. Not facial movements, but movements of the entire face with respect to the head, body, and camera movements.

Remember CGI Legolas? We learn from an early age to do the mental calculus to predict movements of objects. A young child can catch a ball. So our brains are really good at picking out movements that seemingly defy physics, at least ones that we're familiar with (motions of falling through arcs, swinging, etc). Stuff we're not familiar with (i.e. catching someone falling off a building) doesn't jar us the same way, so when Superman catches Lois our brain doesn't say 'she should be paste' (making the falling much slower than would really be helps too).

Anyway I'm rambling, I agree that it is in the eye of the beholder, and everyone is going to have different tolerances to different things based on many different factors. Some people are going to be bothered by whatever path they choose, so they might as well pick the one that I want they want.