Curiously the cleric and wizard character sheets only have seven spell levels. I wonder if this part of character sheet design was intentional. It would be an interesting change.
Yes from what I remember, it will be like that. However, I'll house rule it out, as we have already increased spell levels to 13 (and redistributed some spells). I'm not going to change cosmology of my worlds
I remember them saying something about most games only going to 12th level... Maybe the core will be level 1-15 and 16+ will be an add on high level campaigns