I think it would be cool to have a CON-based sorcerer option, just as one can build fighters that focus on either STR or DEX.
The dragon bloodline sorcerer in the playtest docs is so fighter-like it would seem an ideal choice to make CON-based. Other bloodlines -- fey, frex -- would be better CHA-based.
Mapping the mental stats to the physical stats (or willpower to a single ability score) seems a bit too much like the 9 alignments and the Great Wheel. Can't we let the ability scores just be without all the 'gamist' cross referencing?
The dragon bloodline sorcerer in the playtest docs is so fighter-like it would seem an ideal choice to make CON-based.
I don't think it would be cool at all as a physical stat has absolutely nothing to do with the sorcerer.
Don't get me started on thatConsistency allows for a better balanced rule system.
I'm starting to wonder if it's a mistake for the dragon bloodline to grant armor and weapon proficiency. What is there about being descended from a dragon that trains you with longswords and so on? It's different with cleric domains, because that represents the training you've had as a cleric through an actual organization. But what's stopping a kid with dragon blood from deciding to read books instead of practicing with a sword all day?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.