Kahvi as a wolfrider. I don't mind her being Two-Spear's kid, but it seemed moronic to have her fall into a plot-device pool when Willowgreen was her mother! Furthermore, if there's been so much wolfblood lost as to make her practically immortal, there shouldn't be enough there to facilitate a wolfbond. Feh, I say! FEH! It takes away the uniqueness of the Go-Backs and adds nothing.
Tier as Kahvi's kid I kind of like, actually, if only because his existance seems to indicate that, at some point, my favorite chieftess was snared by Recognition. I love to think of Kahvi fuming and railing against that. ;)
Nightfall's parents don't bother me either. Elven genetics are just plain weird, especially with all of the close-mating that's gone on.
The unifinished stories I have faith will be completed in time. And if not, there's always fanfic.