An old friend of mine got to try the beta the other week as well and, while he had a lot of positives to say about it, I thought one of the negatives he raised was interesting.
He is worried about the strict classes as he was wanting for more of the feats/skills to be available to all classes. He felt like this was possibly some attempt to make it more inline with the traditional mmorpg approach, as opposed to the tabletop approach.
I too find that disappointing to learn, as D&D is already class restricted enough for me without adding some further restrictions to it.
It's not a deal breaker, on paper, but I'm curious to see how it plays out in practice for my enjoyment (or lack there of).
Just thought I'd mention that in case anyone else has any thoughts or light to shed on it.