It has been reported that there is a new company policy within TNA as to how they are using talent.
The new policy is that if the creative team does not have any storylines for a performer, that they simply will not use that talent on TV. This is the reason that wrestlers such as The Pope, RVD and others have been off of TV for long stretches.
I wrote it as "new" because in reality, this is just a formal acknowledgement. TNA's done this for a good while now. Most notably since 2010 when you had Jay lethal pushed for a month, vanish, and then Pope was getting a push and so forth.
With TNA's product today, it's solid with simple storylines and a straightforward idea with what they want (James Storm as top face, A Double's push and so forth) But at the same time, TNA is grown to the point that the roster's star power is too big for it's own good TV wise. As a result former World Champions like Mr. Anderson and Rob Van Dam have to full blown leave TV to allow a steady stream of talent flowing. Yeah, you could say "these guys deserve airtime regardless" but if it weren't for that, guys like Austin Aries, Zema Ion the Joe/Magnus team and so on would not get as a fair a shot at the spotlight as they get.
I realize it's a bit harsh, but it's a sacrifice worth making for a bigger investment. Guys like Anderson and RVD have a good enough resume to bounce back as soon as they are needed and we get guys like Austin Aries and Magnus headlining Impact Wrestling once in a while.