He's one of the more needed in the wave? Just guessing... Would a Clone Sgt. or Pilot do better at this point ya know? I dunno. To me, him, Padme, and that Luke are the more premiere figures in the wave in terms of newness... vader's always Vader for demand too, so him, but he's a little less appealing to the older crowd I think.
The rest I dunno. I'd think Luke would've made more sense to double-up than even the Clones.