I say, who gives a fuck? As a player, you play on the surface, you feel how the ball reacts to it, adjust accordingly, and that's it.
Well, some players aren't born to push, why shouldn't they be allowed to play successfully with their own weapons? And if you're a pusher, why should you be a title contender in every slam? Only reason it money for ATP/WTA/ITF.
My ideal would be as follows:
Wimbledon: Fast with low bounce.
Serve would be important, and S&V more commmon. On the other hand low bounce might be a problem esp. for taller players.
US Open: Fast with high bounce.
A slam for big-hitters who might have problems with grass's low bounce. Also, higher bounce obviously gives more time to make court play like a slower court.
Australian Open: Slow with low bounce.
As there would be two fast surfaces, there should be also two slow surfaces. On the other hand, low bounce would make the court playing faster, I think that was the reason why low-bouncing Hamburg was Fed's best clay tournament.
French Open: Slow with high bounce.
That would be the pushers and moonballers slam.