Indeed. Physically, Pau is probably better off than Tim was in 2014. Pop's inability to get Pau to play to his potential is at least a big of an issue as LMA's play. At least Aldridge has upped his defensive game.
Only thing I can guess is that Pop sees Bertans as a PF/C and not a combo-forward. As I've mentioned before, they are actually slightly bigger than they were this time in 2013. I would imagine they have plans in place for other bigs beyond Costello and Brimah. Could see them being attractive on the buyout market. There are a number of centers who could be available.
I'm not sure there is a final spot available. Bertans would be in line for PF minutes at least as much as Forbes or Paul are for wing minutes. We don't know what the plan was for the bench given the roster changes, but Kyle may well have been the 11th man, with his insertion into the SL meaning nothing.