Gathering from what little info was released, it's pretty clear that if something was a class in 1/2/3/4E, it will still be a class in 5E. Not really totally extremely surprising. I know their is a small proportion of "4 class core all else optional" proponents, 20% in my rpg.net poll, but it looks like this won't happen.
As for the Sorcerer, PF pretty much has the flavor of the class nailed down for me. Bloodlines rule. I just don't like that the class suffers from the usual linear fighters quadratic spellcasters. Fix that and I'm happy.
I actually like that Sorcs and Wizards use the same spell list. Same magic, different approach. (Also cuts down system bloat)
If I could change anything, I would make Sorcerers better at metamagic. It seems natural to me that someone who relies less on formulas and more on instincts would easily be able to make bigger or smaller fireballs as he pleases. We'll see.