I think they do need a mid-card title because they have changed as a company over the last 2 years or so. It used to be that you were either Heavyweight, X-Division or Tag Title contender, the X-Division had more star power, AJ, Christopher Daniels, Samoa Joe, Petey Williams (before he got buried) and so on. The heavyweight division was smaller too, Abyss, Jarrett, Raven. Nowadays there are far more heavyweights, Sting, Angle, Cage, Steiner, Mesias, Booker T, Tomko. Now that's fine, but the X-Division has also matured so to speak, AJ and Joe have outgrown it and are now heavyweights while other X-Division talents have left the company. With less people of a lower calibre are in contention for their former mid-card belt and far more of a higher calibre gunning for their main title it creates an inbalance.
There needs to be a second-level belt, and that doesnt mean the X-Division needs to get sacrificed, it's just because those top-level talents can't work an X-style match, it's not about weight limits so it's not like the crusierweight division which is expected to be lower card. Just those heavyweight guys work a different style of match and need their own belt. I think the problem with TNA at the moment is they have too many guys with nothing to do, Joe & Booker for example. Robert Roode is damn good but he isnt good enough to hold the main belt, a solid mid-card title reign could make him though.