Not sure about the ugly tiefling but I think the wizard as it is presented here. I think the daily spell slots keep enough of the old flavor and the at will magic missile (or some such variant) makes the low level wizard less tactically silly than it was before.

With sleep as a daily spell I'm guessing fireball and the like will also be daily spells. This would be good in my opinion. I was worried about fireballs going off in every room of an adventure.

The way it looks so far and hopefully this is consistant up the levels is...

At will: Single target attack spells or powers

Per Encounter: Single target attacks with more damage or multi-target attacks with target type limits (such as turn undead)

Per Day: The multi-target spells and powers.