I like the concept, particularly since these little mini-abilities are specifically designed to not affect melee or spell combat.
In fact, some of the abilities are specific enough that they may actually coax some roleplaying out of a powergamer -- perhaps a Knight will be more likely to care about the nobles/king because of his Diplomacy reroll, and perhaps an Archivist will try to decipher more script now that he can't get false impressions, etc.
My players hate the idea of dead levels so much that we've moved to playing a lot of True20, where all class abilities are feats and you get a feat a level. They love it, mostly because of that 'cookie' mentality that Piratecat described so well above!
I mean really, who doesn't like cookies?