Updated animations could easily be implemented as a passive trait you earn at xx level. They could even easily make the new animation a toggle feature in the character customization menu for players who prefer the old animation. Hell, these are the type of things they should gate behind content, so only the players that actually want it will go after it.

The issue I see is if resources should be used towards such changes. But I also see resources being used to glam Zhloe, so you have my support that's for sure.