wonder how he would have done last night
Depends really. If he'd continued playing so few minutes as last season, which with Wino and Lallana's form I guess is likely, he'd probably have looked as rusty as Can last night.
If he'd hypothetically have come to play for us last night, after starting the season at Stoke playing regularly, we'd probably have looked better in the first half.
Essentially though, there's no way he'd have been playing as well as he is now if he was playing for us now, because yesterday would have been his first league start