REAL tennis fans want to see a contrast of styles- i.e. serve and volley on these courts and grass, brutal baseline exchanges on clay, and flat ballstriking on hardcourts.
Serve and S&V became too dominant in the 90's. Goran and Sampras turned Wimbledon into ace fests. Public was getting bored and in order for the sport to take a step forward and keep its popularity the surfaces HAD to be slowed down.
Serve is still THE most important shot in tennis today, just not AS dominant and that is a good thing. Lesser reliance on serve forces the players of today to be more athletic, more fit and to develop the technique of groundstrokes. The entertainment value of tennis has gone up significantly. People longing for acefests have forgotten how boring such matches were. One break, one mini-break
and you could lose a set. It wasn't fun, didn't have any drama or suspense.