That said, I actually didn't notice the CL increase. And with the sorcerer's already limited repertoire of spells per level, it makes it okay I guess, as they won't ever run into the problem of looking for spells to add to their list anyway.
Do you think the CL increase isn't enough? Would an increase in spell's save DCs also be appropriate, say +1/2 ranks (max +2 at Mastery)? It would be appropriate as I sort of feel that sorcerers' spells should hit harder than wizards' anyway.