Yeah, this is my single greatest concern from the playtest. Heavy armor being borked, starting HP being a bit high - those are just numeric problems that can be dealt with.
But the clerics seem to tread way too much on other classes' shtick. Sure, the Moradin cleric doesn't dish out fighter damage... until he casts his self-buffs and uses smites. And nearly all his spells are self-buffs. If he wants to be, he can be as good as a fighter for a minute or two each day, and close to as good for an hour. And if he doesn't want to, he can heal and blast undead.
Meanwhile, the Pelor cleric gets to be a radiant blaster, dishing out ranged damage sort of like a wizard except without the crappy AC or spell disruption worries. The wizard at least seems to have a serious versatility advantage, but I'm not sure that it's enough.
The poor fighter, though... why would anyone play one? A cleric of Moradin with the Slayer theme and a two-handed weapon could decide on-the-fly whether he wants to dish out damage like a fighter or heal like a cleric. The fighter gets to choose whether to fight like a buffed-up cleric, or... well that's his only choice, actually. Blah.