ok… while looping that in background… my comments:
I like this scene setup more. brings the dancer out nicely…
now that you put the rain in, it means you have A LOT more things to worry about when you animate her. she has to react to the rain. I see you made her look up, and raise hand in the end, but that doesnt really cover it… when the first raindrops fall on her, I thikn she should react more… shudder, be surprise… something like that, instead of just calmly looking up.
then when it continues to rain, ofcourse that sort of thing should bug her… so more expression…
then the dance movements:
the backward walk in the beginning is jumpy. she seems to “lock” on places. smoothen that out.
also she spreads there her hands out… they are very fast motions, too fast I think.
when she prepares to spin around, she does a little back-and-forth there, plus the left hands is “stuck”.
after her twist, the left hand comes “from behind”, back the the rest pose,
and that is again quite fast, and motion should carry on smoother to the next “arms wide” I think… there is a little “pop” between.
then the nice pose of extended leg and arm up looks ok, except your ipo curve for leg seems to keep on going when you move to next pose (leg in front) … this make you have have a “wondering bone”, so when you have the pose already, the leg keeps on extending before moving to another pose. also it makes the knee pop.
then the walk away part, it’s quite good… there yet another fast transition right when she starts the walk… little smoothing there.
all and all, it looks like you have several actions, and you combine them in NLA ,… and the transitions of the strips dont quite fit. play more with blend-ins and blend-outs of strips to make them smoother.
it looks like you are doing very good job on the posing, and animating too… so now it’s just little fixes for timing and transitions… that’s all.