Dubs VS Subs
I'll be the first one to endorse watching foreign films with subtitles instead of dubs due to the fact you're getting the actors pure performance, not some voice actor trying to copy the emotions of another actor on screen. It's unnatural.
But with ANIMATION.....I don't see why there are so many arguments. Especially with Japanese animation, their mouths are generally flapping up and down anyway. I truly don't understand "purists" who insist on watching it in Japanese when the language isn't thiers and they have to use subtitles. I think this "purist" notion is misguided and has been carried over from live action film which in that case I completely support. It's nonsense to argue, as most characters mouths are just going "MMMAAAMMMAAAMMMAAAMMMAAA" regardless of what audio language you put over it.