Homeland Season 4 [SPOILERS INCLUDED]

Hey fellas,
This one includes spoilers, so for those of you that didn't finish Season 3 of Homeland, DO NOT CONTINUE.

Season 3 ended when Brody died. They already announced season 4, and after searching a bit, I saw these are their plans:

"This is a show that is fundamentally about a field operative and we really haven't seen [Carrie] —with the exception of the very beginning of season one—out in the field operating,"
He continued, "So the likely plan for next year is you will see her on the ground in a foreign capital doing her job." Nevins also disclosed that Mandy Patinkin's Saul will continue to be "central to the story" and he will be as involved with Homeland in season four as he was in the first three. Phew!"

I really can't understand how they can continue this show without Brody... he's no longer a threat to national security, he's dead, and the plans for him died with him. Is it just the money talking, or they can really continue this show without ruining it?

Also, what do you think about the season 3 finale?