Excellent work. Did I say this yet? Maybe not, because I can't stop thinking it..
The vote slider should show you "approximately" how much Voting Power you have left. That would make a huge difference, like this:
The numbers are not accurate, but it gives you an idea... At a glance if you knew how much your next vote would affect your remaining voting power you might be more apt to pay attention how much you spend each time.
Awesome idea!! I'll look into it.