Well I for one think they will keep Instability and the Daemonic Gifts. No reason they shouldn't.
It would be damn ugly if they didn't though. Just godawfull. I would seriously concider continuing with the current book (despite everything) in that case.
Can't really see why their LD would be going down across the board either, halfblood, that already happened when they 'lost' the autopopping to breaking their unmodified leadership, if you remember.
Besides, as the more moderate estimations in this thread has shown - there's just no reason for it.
But hey, anyone's guess is as good as mine of course. But I reserve the right to keep my mood up and hope for the best.
Daemons can certainly be redone in a balanced way without dealing out sucker-punches that will only satisfy the warped minds of exactly the kind of 'gamers' that should never be satisfied.