The competition is fierce because there is practically no main event (I think I've said this before). Barbosa is the only guy on the roster currently who I couldn't deny being among the top dogs. Everyone else are floating around the upper mid-card area at the moment at best with some about to bust through the glass ceiling.
Ricky Runn & Vega are ridiculously close with big milestones backing them (Gold Rush & last Mayhem champion, respectively) with Saboteur running behind. They need a big win to accelerate them into the big time and it's not necessarily a World title win (although that is the big one to push them). A program that Blade & Triple X are currently riding out would work wonders as well (which is also working for them too).
There are others but I'm afraid I'd be here typing forever. I could do a roster review, though...