If there won´t be some major changes from PTR sorc will be trash…
If you will be fighting mobs around your lvl, you will be ok. Game is trivial.
But if you would like to do some more challenging content where dmg and hp will scale, sorc will be really bad.
I think someone important from blizz is butthurt bcs his barb was smoked in pvp by sorc in d2 and this is his revange.
Hard to belive someone can be that incompetent in term of balanc.