This just seems like a bad idea, and jumping the gun besides.
Why not wait and see the licensing terms, first? If they're terrible, deal with it then.
With all respect to the Necromancer folks, this is a new game that looks breakable if you're not careful, and I'm already skeptical about how wise it is to add a few hundred more spells into the game. (Because only one needs to be broken.)
Already in the Concentration thread, a poster has suggested a completely wacky feat and doesn't see how broken it is.
I think Mearls is right to urge people to wait for the DMG.