Why doesn't Tryndamere get sultan Tryndameres AA'S on all skins?

Honestly sultan has the best animations for him so why doesn't he get the animations on all his skins it could bring more character into Tryndamere with him swinging alot better and pulling the sword when he walks it would be like the Jax auto attack change but just possibly faster and easier since you wont have to animate a whole new animation for it