Before beta this is what the ui looked like, truthfully would rather have this than what we have now.
These are the changes I would do, hide minimap tab, remove center portrait (the highlight already gives enough enphasis on what character you are on), move toggles to a button above bar that expands up, your not going to be using these that often, all the actions on the left can be condensed into one button with a pop up and thrown with the other buttons to the right, recenter and expand number of slots.
Edit* oh almost forgot, Solasta ui looks like a mobile game.