His time is up. I know he doesn't have Griffin but there's still no excuse for losing a series with homecourt to a bang average team that's still learning playoff basketball for the most part. They've been out-executed, out-hustled, and the game 1 performance shows he did not have them ready which obviously falls on the players as well though.
His moves as a GM are as much a reason for this as his failures as a coach but in both respects the Clippers need new blood. That said, it might not matter since Paul and Griffin are probably a lock to walk this summer.