I think that's a bit of an exaggeration.
Solomon seems like he can at least defend. So, when Calderon's out just run the offense through AP, and take your time with it. Run as much time off the clock as you can until you bring Calderon
I think you can minimize the damage. Spotting the other team 8-10 points a game seems a bit drastic. That's the difference between a 40 win team and a 50 win team over a season.