Technical limits noted, I hope GIMP has a nice plugin that can trim and then export layers.
I do not recall changing such, but I probably did. And I definitely did not reset cropping for anything, so it was impossible that I could be careful for not cropping out any feet.
I am going to try "source rectangle" set on its default, "trim rect to animation".
Magehands' feet still appear cropped for the last pixel.
Run's feet still appear cropped for the last pixel.
Shimy is completely fine.
Shoot's feet is not cropped but does fade to almost nothing in the middle of the animation but are present in the first and last handful of slides, though the feet never move.
Walk's feet still appear cropped for the last pixel.
All animations start from the same copy pasted start frame, all setup identically.