Sanchez struggled at the beginning of the match, but grew into it and there were good signs. I do feel many are overrating his performance a bit though. He ruined a couple of good attacking moves with overhit or badly placed passes, and overall I'd consider it only a 'decent' match.
Was it an improvement? Yes (both on his own performances and compared to Lukaku and Rashford upfront). I hope it continues. But I also hope he improves further because it still wasn't quite good enough for my liking.
To me personally after watching the game twice, I didn't really see much different. The second time I was even specifically watching to see our players in the attack function. In the first 30 there wasn't really any attempt to get the ball forward to him, that is fine because it is almost as though 100% of the time with Lukaku we play like this. Not even trying to get the ball forward. The goal kind of came out of nothing and you'd expect Sanchez as an adept wide player to be able to get in behind and make things happen for the cut back. Really impressed with how Martial initiated early and came inside to drop deep for the cut back. That is something he's not been doing at all in the last couple of years for Jose. Chuffed to finally see him improving his movement off the ball when we're in possession. In the next thirty when we started to control the game the service was still scathingly poor. Some passes went behind him, one telescopic header that was nice but generally there is not enough forward penetration from midfield that allows the front striker to peel off and get free to create. (actually there was one nice off the shoulder play where he was clearly onside but called off which was the trademark 1on1 we create every game so that was nice).
It is pretty awful stuff to be honest. All in all, nothing we've not seen Lukaku do in the last couple of seasons. He's definitely in awful form at the moment but we've seen him make these open space runs and make plays in open paddock.
I think this could come at a really sweet spot time this Sanchez run of games might give Lukaku the rest he needs and Sanchez' efforts were definitely serviceable on the whole. Probably marginally better than Rashford and well in advance of the horrible form Lukaku is in.