I'm afraid there's no return from the homogenized surfaces. If you come up with anything faster at GS/M1000 level, top players (consisting mainly of slow surface specialists) would complain about too different surfaces. And I guess ATP wants all surfaces play the same so that same players do well on every surface. But hopefully they'd understand that eggathons of 6 hours in Bo5/4 hours in Bo3 aren't anymore good for the players and are already too long for TV viewers. Even if they keep the surfaces homogenized, hopefully they'd at least have fasters surfaces, leading to shorter matches and favouring equally defensive and offensive playing.
There's a point an egg is just not enough, and then you'd have to take 6 months off to recover.