As Long as Rick can function and the group can keep progressing, I don't care if he goes Coo Coo for Cocoa Puffs. However, like I said before, If they spend to many episodes drilling in the fact that Rick's Lost it, Rick's gone over the edge, Rick's lost his marbles, the show is going to lose me again.
I understand that the show is meant for more then just chopping the heads off zombies, that they want to convey to us how this would effect peoples minds as well. But I think they have done that enough. I think that we understand that and accept that as part of everything that goes with the show.
If Rick needs to go off the deep end for a couple episodes that is fine, but then Daryl needs to take over Rick's roll and Rick needs to be down played until he is in a more stable mind set. And honestly with the last scene where Daryl was just standing there holding the little "Ass Kicker," it feels like to me that's where they may be going, and possibly how Meryl and Daryl reconnect.
As Far as the the Lori thing, she better have died. She can come back as a zombie cause with where the bullet was it looks like Carl didn't actually shoot her, but she better be dead. Carol on the other hand, I think the have an opportunity to introduce something new to the prison. But I've never really cared if Carol lived or died so what ever happens to her is fine with me.