A few points
Hey guys, been lurking here for quite awhile, but the last few updates finally got me excited enough to register.
With that out of the way, a couple points:
*While only 2 "at-will" powers may seem kind of low, keep in mind that this number can very possibly be increased by class features, feats, certain paragon paths, race, etc. From the pre-gens we already know this is the case. Additionally, you will have encounter abilities from many of your magic items. If you really look at it, a level 20+ character will be able to have at "minimum", completely disregarding any of the aforementioned possibilities, 2 at wills, 4 encounter, 4 daily, and 5(up to 7 at 30) utility powers to use in any given combat. This is 15 viable options per round, and it makes the wild assumption that you will not be using your items or gaining any other powers through feats/class specific features, etc. Honestly, outside of a Wizard (and even then... it was a close thing) I never felt I had 15 legitimate options in 3.x during a combat round. Certainly not as a melee class.
Also, keep in mind that these are "combat" powers. Spellcasters will have access to Rituals as well, and although we do not have much information on them, I think it is safe to say that the the "Powers by Class Level" chart is not the breadth of what your character can accomplish.
* While it may be old news to some, this is the first time I've seen that Constitution is a one time hit point modifier. Under the 3.x rules, 18 Con vs 8 Con at 30th level would be a 150 hit point difference. If it is now merely a 10 hit point difference, this is (to borrow an MMO term) a massive nerf to CON (and in a roundabout way, a massive buff to the "Toughness" feat that we've seen). Additionally, if your Fort Defense is based on the highest of either your STR or CON modifier, I don't see any particular incentive for Defenders to worry about massive CON scores. This assumption precludes requirements for Feats, Paragon Paths, Epic Destinies, ect.
Anyways, very exciting stuff!