You know my thoughts on these belts, they are meaningless by nature. The WWE/WHC say you are the best this company has to offer, the Tag straps make you the best tag team, and the Divas' make you the best women's wre... Model. What do the IC and US belts symbolize? Best in the world/US? Not if the WWE/WHC mean more... Mid-card champ? Even to casuals, it just means you are the "best of the rest", especially the way WWE's midcard is packaged as a bunch of irrelevant filler. Woo hoo.
Plus, they give UnCreative yet another crutch so they don't have to actually do their jobs and write storylines. Get rid of them both.
Maybe I'm just newer and didn't see what the belt can do before, but I don't see what you could do to make that belt relevant. TNA's crowded ass roster doesn't have enough room to spotlight everyone, so the TV Title guaranteeing you a spotlight each week means something. WWE is adamant to keep the NXT/Superstars guys off of TV (unless they are getting squashed) so that doesn't really matter either.
As for them opening up room for the Tag straps, not really. They have to protect the Night of Champions gimmick so 1 belt is usually left off each PPV.