well, Titanfall is essentially a source engine game (although the engine is heavily modified), so i'm a bit annoyed there isn't native linux support - but afaik all source engine games do well through proton (this includes apex legends, but EAC is its only undoing).

i've never played it on windows, so i can't give you a 100% answer. i've never had any issue with it, and i don't think you'd be able to tell it wasn't a linux native game.