I can’t ignore this anymore! Something should be done about it!

[Jennestia]

I don't know a lot about making games and what not. But if they add bigger butts, doesn't that mean they have to redo a lot?

Yep, they'd have to redo every model and even set NPCs which at times aren't tied to the player models - they would also have to redo some of the armor models or the way it fits characters, so all in all, it'd just be work better spent on something else much like the work spent on minions could have been spent on something else even if it seems minimal.