that is the purpose of the whole show – we always had fairy tale characters as either white or black and OUaT changes it by adding all those extra layers to everyone – Charmings are far from perfect and Regina and Rumple have started off as good people (sort of) before the power took the worst of them.
Both of those villains have their reasons to act the way they are and deal with obstacles in the worst possible way, just because it’s easiest even though we see they still have SO MUCH to learn!
And as much as I’d love to see them redeem themselves, I cannot see it happening for they’ve done so much bad in their past and fear that sooner or later they will be killed off… I cannot see Rumple EVER giving up magic and manipulating people and even though Regina is making progress, she still doesn’t know how to handle feelings and she will just react with anger which will be her undoing…