When making animations that can both affect the same part, oftentimes I've encountered weird issues with overlaying animations that I need to manually look through a ton of animations to find what's affecting it. This frustration is coupled with the need to compare it actually being in the game, rather than looking at the animations in the editor as often times things show up differently between the two. A tab you could see while in the animations test menu or when you "test ingame" and being able to see what animations are effecting what parts would be a life saver, even a view like the model view where you could expand the part to see whats currently being applied would be fantastic.