Dude that doctor is getting killed no doubt about it... Rick is P drunk right now and he wants that girl.
Also, Carol was straight extreme with the "there is no other choice we have to kill him" what they just can't talk to him.
Carol starting to remind me of this lady from a movie called "The Mist" where she started getting power and ordering people to be killed for the littlest things when they were trapped in a grocery store.
Yeah thinking about it though you might be right Maggie might become the voice of reason for the group because right now they are straight wildin' with no morals or thinking about the consequences of what might go wrong with their actions.
I think Michonne still has her head on her shoulders with Maggie, Glenn going to do what his woman says and he still has some morals too, but Rick and now Carol are getting power hungry or something and just want to do what they please. Sasha is balls to the wall crazy right now too and Daryl would follow Rick and Carol so what's left is decent minded people from the group and no dambs given part of the group.
Abraham might be the dark horse and just wants better for everyone and to survive through it all.