*headdesk* Say what you will about them. I love Dragonforce. Even though they're mostly recognized for their hyperkinetic guitar solos, I can't imagine Dragonforce being the same with a different sounding singer. Theart just gave their songs a special kind of groove.
I don't see them making an album better than Ultra Beatdown. They actually took the effort to diversify the music texture of the songs in that album and slow things down a bit(before speeding them up), and Theart actually seemed like part of the songs instead of disconnected from them.