Romero - Chris won round 1, lost round 2. He was telegraphing the single leg too much and it was a matter of time before he paid for it(which he ofc did).
Luke - Weidman took round 1, Luke took round 2, round 3 was a sloppy gasfest. Chris was ahead in the round before the spinning goof but the fight wasn't in the bag.
Gegard - Weidman won round 1. Round 2 started well for Weidman but Gegard turned the tables and had the momentum before the knee fiasco. With Weidman's cardio looking as it did and the TD attempts becoming labored and sloppy it was not looking good for him.
Only rematch I think The Chris might avenge is vs Luke. Not because Luke is having a rough go of it, rather the elements for Weidman to be in more control of a second fight between them are there. During the first fight he was charging into the check hook repeatedly earlier but he and his corner adjusted and actually started baiting it for counters by late round 2. Both in his own body kicks and in coming over the top similar to Yoel's killshot. Also overall Salt Luke City's TDs aren't much of note esp. outside of the clinch.
I can see Weidman bringing smarter pressure in a rematch, already keyed in on Rockhold's check hook and roundhouse, and disguising his TDs better to take a decision.