I think after the Day Trip with Michonne and Morgan, and the Camp Woodbury Talk with the Guv'ner, Rick has put Crazytown behind him. If they were to kill Maggie, I think they would do it at a time when the reaction from Glenn could be held off until next Season (IE: Next to last episode of Season, which no time to soak it in until next season or last episode). But, again, it's certainly not what I want to see happen
I'm inclined to think they'll keep Maggie and Glenn alive because they're the only couple on the show.
It's true, the "Only Couple" thing gives them a certain invulnerability, but, they can always bring Carol and Darryl together.
One Day I hope to be the Man my Cat thinks I am
Where are we going? And why are we in this Handbasket?