As long as Ultimates is successful, Marvel will do shit too drop it. They're making money out of it, right. Think about it, we get more and more addition to the ultimate universe. they obviously wanna sell more ultimate books (three minis this year alone. compare it to the whole number of minis so far). I actually doubt the'll drop ultimates.
ultimate ff have had many flaws
As a comic fan growing up, I never really understood S.H.I.E.L.D.'s reason for existing, other than being a suped-up army with a cool name, but now since I've started reading the Ultimate books I understand their role more and more.