The foot movement and wieght transfer seems a bit floaty. And the “ninja moves” are pretty boring in-and-of themselves. Maybe combine them into one fluid combo of sorts. I think the main distraction is the lack of overlapping motion (the pause after the moves before he transfers his weight and moves his feet). And the timing doesn’t vary enough to carry my interest (move, pause, step, move, pause, step, kick, pause, plant foot).
He actually doesn’t even need to do any martial arts to make the animation intersting, He could just be standing around acting however your character personality dictates. Give him an internal motivation, a thought process. Here’s a site to check out - panzar.com - they have some nice motion tests for their warriors. Most of them don’t even need to do any crazy moves to give them a sense of purpose. They just have some personality. And that’s what will help sell your characters.
Hope this helps