The balance can be debated, but so far I love the core mechanics and flavor of the sorc.
I especially like the idea that the sorc gets unique benefits when running out of spells, and then creating a nice flavorful way for it to make sense.
So what say you?
It's too early for me to say. I don't like Draconic Sorcerers; and that's all we get in this first iteration.
I want to wait and see the Storm Sorcerer and the Chaos Sorcerer. When we get those, I will be able to tell you what I think, and feel, and believe, about the 5E Sorc. ("Dragon"-anything for PCs, be it "Dragon Breath" or "Dragon Scales" or "Dragon Strength," make my eyes glaze over. The PCs are supposed to be fighting against that stuff, not embodying it. . . .)