The issue here is that whilst MS worked really hard early last gen with Mistwalker and all the third party exclusives, it seemed that their end goal was really to be able to get a mainline FF on their platform.
Have you noticed that once FF 13 was announced on the 360, there were no more MS funded exclusive Jrpgs on the 360? Mistwalker was basically tossed aside like garbage afterwards.
It shows how much MS really cares.
That's really all they wanted in the end, wasn't it. They even allowed cross platform play with PS2 on FF11 just to get FF on their system back then. But once that had 13 they dropped the rest like a hot potato and never looked back. The writing has been on the wall since 2009 or so, so anyone paying even the slightest attention should have known where most of the support was going to land this time around.