It lacks force because there's no weight to the things you do! the animations here are very good, way better than I'm currently capable of, but in order to convey force you have to think a bit more laterally.
For example, on that run animation the run is very even and the hips don't move a whole lot. The pose is very upright and static, and as a result it gives the appearance of a sterile jog!
However, if you were to lean her forward, that stance change alone would give her a much more determined look.
Moving further, you're not over-extending or winding up much. For example, on the run you could have her leg shoot forward a bit more and a frame faster to make it look like she's "kicking" her legs forward to move faster!
this also applies to the kamehameha thing in number two, add a few more frames of windup during the collection phase and add a bit more lean-in on the expulsion.
It's ALL in the timing!