I played Tera in beta and didn't see animation lock, I didn't play the slower classes though, but then if you play a slow class maybe you should expect that ?

in real life, you can't do a cartwheel and a pole vault at the same time while simultaneously shooting an arrow, so in that sense, animation lock isn't really a big problem
-.-

It is when you are provoking something and can't move, I don't think anyone is against animation lock during weapon skills as that kind of makes sense, but when doing 2-3 buffs in a row and being stuck in place it's not a good thing and makes you feel like the game is purposefully trying to hinder you.

Also about weapon skills, you shouldn't really be locked any longer than the length of the animation, but in the case of this game the lock continues a while after the animation is over.