A few random thoughts:
-I really like most of the classes. Often times, they're not as much as I'd like them to be, but for what they are, they're really good.
-Feats are disappointing. We've pretty much seen all the racial feats at one point or another. There's a few new ones, but not much. And each race looks like it only has one racial paragon feat, and no racial epic feat. Epic feats in general are disappointing. There's not many of them, and half of them are just 'You can crit on a 19 or 20 with this weapon'.
-Artifacts are an absolute abomination that shall never be spoken of again.
-Magic items are good.
-It'll be interesting to see how mounted combat works in play.
-Epic destinies are a letdown considering there's only four of them, but paragon paths are great. It's easy to see that doing the extra multiclassing in place of taking a paragon path is suboptimal, though.
-All in all, my enthusiasm went from a 10 at the announcement to a 5 during the pre-release stuff and now back up to an 8 or so after spending some time with the books.