I've helped some of my friends see that just because a game is 2D doesn't mean it's dated through BB. When I first saw the game, I thought it would be GG-lite but that changed after playing it at an anime convention and then receiving it for my birthday a couple months later.
I still play GG but BB feels more like the full meal deal to me. Can't wait for Continuum Shift so I can beat up Hazama/Terumi!