A big problem with what Blizzard is doing with the Forsaken is the extremity to which they are taking it. There is precedent for less "lol evil" Forsaken- perhaps not exactly morally good but at the very least ruthlessly pragmatic in the same vein as the Ebon Blade. It wouldn't take a genius to write, just have them slowly develop a kinship with the rest of the Horde (easy to do now they're in Orgrimmar), make the leadership realise that although they hate humanity the best they can hope for is just to keep them out of Lordaeron, and you're done.
But for whatever reason Blizzard has decided that the whole race needs to undergo a complete 180 to the point that any vestige of their old identity is swept away. Even undeath itself seems to be getting a soft retcon, stripped of its staple themes of trauma, emotional numbness, and unholiness, that categorised even the most virtuous of vanilla Forsaken.
Its a move guaranteed to be unpopular for the simple reason that no one is going to play a race if they secretly hate its themes. I find it utterly bizarre that Blizzard is pursuing it and can only conclude that the current devs simply don't like or understand the original forsaken and just want to remake them into something more to their tastes.