to put in my thoughts...

I don't think a one-click system for battles would be any more accurate than the current system because if you only had to click on a song you liked, I think it would come down to popularity instead of song quality.

Also, in my opinion.. separating the voting system into review and battle categories would only make it more complicated. Right now, for me, it's easiest to vote on a song and then forget about it. Also... by separating the system, I think that would decrease further the amount of votes going towards song review.

Someone had mentioned in another thread making it mandatory to rate any song you commented on. I think that's a great idea.