I lament Shane's passing. I'm not sure how the show will work without him.
Quite well, I imagine, if the Governor lives up to what I hear about him from people who read the comics. He'll be a better antagonist for Rick than Shane. Shane's death is the catalyst for realistic change in Rick's charcter. Dude, did you want Rick and Shane to butt heads over Lori for yet another season? More love triangle? A who's the daddy drama to play out? Not me.