From a game developers standpoint it's pretty clear that removing galka's tail means a lot less work on the armors as most races armor can just be scaled to fit.

Same for Tarutarus legs. You can scale mo-cap data to fit the same joints but nodes can't be removed without the end result looking weird.

One can try to justify them as a stylistic choice but whatever the reason the method required a lot less work this way.

Personally I miss Tarutarus and it's what I would play as if they were an option.