A simple suggestion to be able to have multiple animations for 1 pose
EXAMPLE: 3 Sitting animations.
-generic sitting animation
-horse sitting animation
-minecart sitting animation

Differentiation would be made by selecting trigger in drop down of setup(similar to start/finish animations)

explosion damage animation
explosion death animation
fall damage animation
fall death animation

i like your idea, because i was about to make a post with it but im glad someone already did it