The UFC had long used 10 p.m. ET as the start time for PPVs but changed earlier this year. For east coasters like me it was nice to have the evening wrapped up no later than midnight, many times even earlier. But it is understandable that the one hour cut was harder on audiences on the west coast and necessitated a change back.
PPV numbers are down this year so making sure that the start times have maximum appeal to as many people as possible. It's not a "sky is falling" situation, but it's one where you need to make all the corrections big and small to straighten everything out.
This has yet to be confirmed by the UFC but it seems to be correct.
We will continue to monitor the situation and bring word once it is made official.