Honestly it feels kind of empty, like there should be something in the middle of all that . Like a spaceship hovering above the water or some kind of floating temple. As it is it's just a pretty but kinda focusless landscape.

Try to have it follow the head more I think,as it is it feels like there wasnt much thought put into how it would move just that it HAD to move.

Ooh, good refs! I don't have much to add to the bark, but I'm not at my computer and can do a few edits to show what I'm talking about! I actually wound up using the left one as reference while doing this, what I did was move the bulk foliage down some, smooth out some of the top tufts, then inserted some thick branches.
There's still a bit of an issue with it drawing too much towards the top that I couldn't really fix, but hopefully this gives you some ideas!



EDIT: as always, inspiration strikes right as I run out of time and immediately after posting. I think it might help to break up the top parts into separate groups, sothe branching is more clear!

It's looking better! The big tuft is definitely sticking out more!
I think it might help to scramble the smaller tufts though, to my knowledge there aren't any trees with circular puffs of foliage, just breaking up the shapes a bit might mitigate it