I think giving it to Holly is just the UFC's way of hyping up Ronda even more. This is an easy with for Rowdy again. The new supporters of her will get hyped and want to watch her go against the lovely Tate again. Got to remember Rowdys bringing new viewers so they haven't seen the match ups before. Dana's tasted the hype gravy train in dragging stuff out. To be honest though as much as i love seeing Ronda fight, i'm not really hyped up about this fight.
If that is Dana's ploy then I can see it backfiring badly tbh!
Ronda judo-throws and then armbar's Holm inside 4 seconds for the win leaving everyone disappointed that she's not been tested....again.
Tate perhaps takes on Zingano or Correia in the meantime and could very easily slip up against either one - leaving, erm, no-one as the number one contender!?!?

I don't see why Dana didn't go ahead with the already announced Tate vs Rousey III fight, giving Holm time to at least cobble together a semi-decent winning streak and then build up to the "best MMA fighter" vs the "best boxer in MMA"