For my own preferences, the news about the sorcerer is good. I don't know that my overall impression of Next will change when the final game is released, but this is the first thing that makes me want to give it a look.
My preferred version of the sorcerer was 3e with a variant that received Eschew Materials at first level and Metamagic feats at levels 5,10,15,20. I hope they cover Abyssal, Celestial, Dragon, Fey, Infernal and something equivalent to Pathfinder's Arcane and Destined.
What I don't want is for the designers to force claws, transformations, Breath Weapons, Rays etc. on to origins as they level as was done with the majority of Pathfinder's Bloodlines. It is the source of my strong dislike for the Pathfinder sorcerer. I would have preferred that they had been handled as in Pathfinder as 3e heritage feats.
As for the playtest version of the sorcerer, I would not mind if they brought it back under a different name. To me, it was interesting, but it was not a sorcerer.