I like a lot of the things I see in the UA, especially making roleplaying elements like backgrounds more significant to character creation and gameplay. On the other hand, with the added customization and feats to choose from, etc., I hope they don't move away from simple, easy to understand archetypes. They make it easy for new players to grasp the concept, and they make it easier to whip up a character quickly, instead of spending hours building a character before being able to play. I think the canned backgrounds with the explicit allowance for modifying or building from scratch is a good way to achieve both goals.