ProWrestling.Net reports Tara was easily the highest paid Knockout and that is why she was released. The report claims the company was ready to free up that money to be used elsewhere.
There also seems to be some restructuring to contracts for those who work office positions. Bruce Prichard, Senior VP of Programming and Talent relations was reportedly asked to restructure his contract and refused. ProWrestling.Net says it's very possible Prichard could be on his way out of the company.