a) Because David, like the majority of other OVW/HWA/developmental talent, wasn't up for the draft. (Lesnar, Mark Henry, and Rico are presumably being bumped up to the big leagues, but they're exceptions.)
b) Dunno. I think that'd be a pretty amusing angle, but then I'm a Test mark. Of course, just because Test shows up at Raw doesn't mean Flair has to book him, or even let him in the building, but he could always do a run-in. Maybe Vince will send him over to get the Hardcore title back from Raven.
Not much info unfortunately, but the numbers that are there looked like a much higher then usual second hour jump... The 3.4 is actually a lower first hour then (last weeks 3.5). But the second hour 4.0 is much better then the (3.8 of last week).