Regarding the previous animation, I tweaked some of the timing issues I saw so you could better see what I meant!
What I did here was use squash-and-stretch to give the landing a bit more impact, added a frame or two here and there to keep the "beat" of the drawing going, and added that lean-back as I was seeing it!
I also had a happy accident copy-pasting frames, the first frame of the landing with the blue still in from the kick makes great play as a smoother for the formation of the energy ball, as if the power is being "transferred" from limb to limb as it's used!