I felt that in season 4 & especially 5, the writer got a little carried away w/ all the character kill offs. in one episode, 3 well recognized characters w/ fan following died. I understand that given the nature of the show's premise, no one is truly safe, but I think if the show is going to be character focused (which also means that the audience will grow attached to the characters), killing them, sometimes in rapid succession doesnt help.
What happens when the entire "core group" is gone? As it is now, only Rick, Carl, Glen, Darryl & Carol are left from the ORIGINAL ATL group. Carol is the last surviving female of the group (& she's MY absolute fav character on the show

)
many of the newer characters just havent been as well developed & usually end up dying quickly. many of the newer ones are also extremely unlikeable. I can't believe Noah died, while that wretched coward Gabriel is still alive!
I'm not sure about Morgan. I wonder if he'll be too far gone to be a character ppl will want to emotionally invest in. I have a hard time tolerating Rick most of the time these days.
But as for the new show, I hope that it will creatively answer what CAUSED the outbreak.