UX had limits on how many songs from any individual series it could take, and while the Macross F movies are two series (and they spread songs across them) it still wasn’t doable because F’s song rights cost a lot. BX is similar.
Also, I actually kind of like 00 Raiser’s animations. They’re simple, but effective. The BX animations are fucking disgusting, they have no weight as 00 Raiser just flits around like some kind of demonic hummingbird completely ignoring momentum. All the SD Gundams except Nu have the same issue. Of course, people feliate them because movement = good animation in the eyes of a lot of people…