I have to agree with the OP with issue.
Things like the night elf from the warbringers video, after all that occured in that video and everything she said there, suddenly in 8.1. she in her free will turns against her own people and follow Sylvanas after everything that happened.
It is clearly a WTF moment for me. But as Ion has lectured us in his post Blizzcon interview, Blizzard has everything under control because stories are supposed to have ups and downs and Blizzard knows exactly what they are doing, so the costumers should just shut up and wait for the next chapters...
Man, i love that blizzard director... /S