Mickie is going off to do country singing. Look, Daffney and Angelina are hurt now but its not like Mickie can show up next week anyways and both will be healthy when she gets eligible anyways.
Meanwhile, you still have Taylor Wilde and Sarita, who we haven't seen on TV lately. You have Tara and the Beautiful people, all of whom (except Lacey) can wrestle. You have ODB, who is unique if nothing else.
The Knockouts, aside from that stupid lockbox segment, have been a strong point and one of the highest rated segments leading up to Lockdown. No reason to add anyone right now.
This is like the Benjamin thread: TNA has so much talent right now that they can't get them all on TV! Until they get another hour on Thursdays for a 'B' show, it doesn't make sense to bring in many new faces just because they were in WWE.......