So we're just going to ignore that Alleria's void powers saved the Alliance from annihilation at the Battle of Lordaeron? Because if she hadn't opened a void rift for void elves and gnomish reinforcements, then the Alliance army (Anduin and Jaina included) would have been surrounded and overwhelmed by Nathanos' forces, since they fell right into a trap. What does Alleria need to do to prove to the Alliance that void elves and their void power are, in fact, trustworthy? Let alone the fact that Jaina's plan to attack Dazar'alor worked only thanks to Magister Umbric opening a void portal to Rastakhan's gold vaults, so that they could take the scepter.
I don't even care if Blizzard wants Alleria to be an evil Void user, whatever, but the Alliance in this novel does not give Alleria and her people the respect they deserve for their contributions in the Fourth War.