Yeah it was a good cross. But what did he do apart from that, that makes you claim he played 'really well'. Pogba, Zlatan, Fellaini, Blind and Valencia all played 'really well' for example. Rooney was average in contrast. Not criticizing his performance this time but he didn't do anything save for that cross that stood out whatsoever. He wasn't the weak link this time and was fairly average and if that is the his new standard for playing 'really well' then that says it all, really.
Our no10 playing 'really well' now constitutes putting in one good delivery in the whole match, whilst also not losing the ball as much as usual? Think about it for a minute.