First, let me say I realize that none of this will likely mean anything coming from someone who doesn't have any reputation at all, but think of me as a committed fan like yourself rather than a "noob".
I'd like to say that I agree, the Universe is losing whatever appeal it had when first introduced. Do I think it can be saved?
No.
Do I think it should be ended, and revamped as a new, better, ideal universe? Yes, I do. But do I think it would actually work? Doubtful.
The effort would recquire a stellar "think-tank" of writers, ones who aren't in it for money, prestige, or titles, and write because they thrive off of their creativity and desire to tell an epic story and satisfy that need to tell said story. Which, like the true fans, they should have. But no, I do not see this happenning, as there are far too many things that could go awry. Even if there was a "core team" that did nothing but the New Ultimate Universe, discussing every small occurrence, every ramification, every panel together, at least one them would seek something else from the endeavor, deeming it more important that the endeavor itself, and the Universe would slowly fail. A slow decline, but failure nonetheless.
I want to point out that Marvel has failed in the Ultimate Universe, but more importantly, has failed me. Immediately following the release of Ultimates 2 #13, I'm dropping all Ultimate titles, which is a shame as they are all I really have a huge dedication to. I first picked the Ultimate Universe comics up because I went through some pretty God-awful events, and they became my safety net. I hate that Marvel seems to be taking that away from me by not considering the story, or the fans.
I apologize for my rant, but not for how I feel about this. See ya'.