A new version is out. I skipped to version 4 since I had some internal tests to do in the other versions.
In this version (see picture in the first post) I've managed to move all the buttons above the skills, and the skills now occupy the entire bottom of the display. With 18 skills available, I didn't think there was a need for the ugly extra skill bar and removed it.
Also, I've made the player status effect icons a little bigger. I find that this makes it easier to notice when you have an active status effect.