I'll agree with you that many western games leave much to be desired when it comes to animation quality and accuracy. That is however a problem with the developers, and if the developers don't know how to animate things properly, it doesn't matter if it's on the PS2 or the PS20.

If the developers that made poor animations in some PC games made a game for the PS4, they're not exactly going to magically become better at animations. Well, unless they acquired a lot of work experience in their previous title.

I think it's important to separate those two points, and not mix art direction/skill of developers with the performance of the machines.