Where did you hear about the multiclass change? That would honestly annoy me, since you can already make multiclasses more optimized than the single classes and playing around with the tradeoffs was most of the fun in character building for me. I like that I get fireball later, and have a harder time in the early game, in exchange for greater power a couple levels later...
Well, Tempest Cleric 2/ Storm Sorcerer 10 abusing chain lightning, haste, quicken spell and the wet condition is going to be the meta after all, I guess...