I didn't hate Hawke and have no opinion for or against him/her returning. If they're called for in the story, which apparently they are, I'm okay with it.
Though for better or worse, Hawke is at least partially responsible for quite a few of the calamities that now beset Thedas, and often it feels like it was for worse, as we just didn't have the proper options to prevent Hawke from being responsible.
Though the last thing I'd ask for is some pathetic capitulation on the devs' part that essentially says, we admit it, our game sucked, Hawke sucked -- I'd appreciate something simple like a quip from Hawke, as the eldritch spider abomination rises from the earth -- "ok, that thing? So not my fault."