I think tonight's performance in general showed us a lot of the positives he can still offer, while highlighting some weak points.
In a technical sense, he was excellent when it came to his goals. Penalty was fine...well taken enough. The assist was superb though, nice little touch and demonstrated intelligence, with his final strike being s very good one as well.
His inability to take it past Colocinni was worrying, though, and it highlights his lack of pace and inability to deal with one on one situations. Still, it was his best performance for us all season, and he's shown that he seems to have some sort of technical ability remaining, even if he's long past his best. I'd argue that he might benefit from playing in a front two alongside Martial, though, because having him as a lone striker arguably highlights some of his weaknesses. Martial's an incredibly hard worker, and he'd potentially be able to cover for Rooney's physical deficiencies while still allowing him to utilise his more positive aspects that he seems to be rediscovering. He does need to deliver that in a big game now, though.