My initial though was JJ because she got outstruck by a BJJ specialist, knocked down twice and tapped to strikes. That was Rose's first TKO, even if it should have been a submission. Ronda outworked by the fighter with probably the best footwork in the division and KO'd via head kick from a person who's known to KO people with kicks. I can see the argument for higher peak and lower valley, though.
As it stands right now, though, JJ's loss to Rose is sort of like GSP's loss to Serra. People that were giving the underdogs a chance thought they'd have to get it to the mat and win via submission. Both fights end with a first round TKO and the favorite tapping to strikes. That's pretty embarrassing.