It’s because Necrolord and Venthyr share an ending.
They can’t have Kael’thas react because that would require the effort of writing something unique for one of the covenants over the other, and we can’t have that, now can we? 
It’s because Necrolord and Venthyr share an ending.
They can’t have Kael’thas react because that would require the effort of writing something unique for one of the covenants over the other, and we can’t have that, now can we?