Well I can say that I really liked the art style and art direction of the piece! But I can understand why you didn't utilize AA. (And also simply textured and shaded characters are easier for animation so I totally get that too!)
Though I would generally say that learning how to apply AA can be a really useful utilize in your skill board, and can give a piece and even higher level of polish, so an effort to learn more about it can only prove beneficial!
I also think it is really cool that the piece was intended to be animated. And while we sadly didn't get to see this time, I feel like it would be really nice if one day we actually get to see it animated!
Regardless though, I think it was an amazing piece!