Do you think Fernando Gonzalez needs a new coach?

I've just finished watching Gonzalez get straight setted by some guy named Evgeny Korolev and can't help but feel a coaching change is long overdue for the Chilean. His ranking has plummeted to 13 from number 5 and he's basically done NOTHING since the 2007 Aussie Open final. Larry Stefanki has told him to constantly slice his backhand instead of coming over it and that's digging his own grave. Slicing all the time gives his opponents tons of time to set up a big forehand constantly putting Gonzo on the defensive. It is no longer the weapon it once was and that's all Stefanki's doing. The days of slicing your way through matches are gone with the likes of Lendl and Graf. Stefanki should have realized that long ago but he hasn't adjusted and now Gonzo is paying the price. If Gonzo doesn't start attacking with that backhand, he's going to have another terrible year. What do you think?