I'm not sure what they expected tbh, people have been disillusioned with Fable for a while now, it's becoming less and less the RPG and more and more an unspectacular jack of all trades. Then they go and show a video that makes it look like they've stripped every last ounce of RPG out of fable and left us with a linear shooter, they have no reason to be shocked that people weren't happy. At this point, I don't think it matters how good this game actually is. If it turns out to be fantastic, it'll be a fantastic spin off, if it sucks, it'll just reinforce peoples beliefs that Fable is a wrecked franchise. They should be working on making a proper Fable 4 that blows us all away, not.....this.
One. Warrior. Nation.