Not sure why people are criticizing him for the first half performance. He was playing as the CF in the first half - so criticising for not pressing and people running by seems very harsh. CFs do not press on their own nor do they go chasing after players into our own half to "track back". He made quite a few runs dragging the CBs around and gave them a torrid time, enough to where Sancho and Elanga were then getting space.
To say fire lit under him in the second half is also harsh, he was playing on the wing, so obviously his role changed, he had to cover and play the defensive side - which he did but, can't use that to say why he didn't do that in the first half though. Martial came on in the second half and had a fantastic game but, he too was not running around like a mad man - ETH does want our players to press and our CFs yesterday did that I think exactly the way he'd want them to. Not endless running but, at the right moments with others in tow.
As supporters we should be happy that the goal and the performance will give him confidence but, also have to acknowledge that it was a game that player to his strengths, which is where there is room behind and for once there was service and not endless dawdling losing the ball in midfield. There will be the next games now where he has to build on that, the games where we will have more possession and he'll have to find ways to go past people, make the right passes/decisions. For me I think it will be there because unlike last couple of years where it was all about everyone playing individually, now we will be playing as a team. In the past he has shown he is not just a speed merchant but, does play well in a dynamic setup, where there is quick passing between the forwards/attacking mids. There were good signs of that re-emerging in pre-season and along side Martial, Sancho, Elanga and maybe an Antony - with Bruno/Eriksen feeding them hopefully see it rest of this season too.