I think this whole last season was a bit of a stretch, really. But with Regina redeeming herself and no longer being the main villain, they don't really have a choice. Trying to work The Wicked Witch and Regina being half-sisters was too much.
I did like the season finale, actually. I found it interesting how one small action changed everything and they had to fix it so that Snow and Charming still fell in love.
As long as they don't try and make the Snow Queen into another half sister, I'll be fine.