I've been silently defending him for a fair while, but he's been terrible as of late. He doesn't get into positions. His touch has completely deserted him, and he cannot dribble anymore. His link-up play is average, and sadly arguably his biggest asset, so that's just sad. Looks like he can still run pretty fast in a straight line, which he has shown a few times, and he still has a helluva leap on him, but his timing isn't good. There was a game, can't remember which, where he picked the ball up and raced away from the defender, but then he made a poor touch out wide instead of straight or inside, forcing him to adjust and the defender caught up, ruining the chance. Now, that bad touch wouldn't have happened a few years ago, but it's happening all the time now. Heavy touches and lack of agility.
If he has to play, I think he needs to play alongside Martial, and perhaps use Ronaldo as a left forward and Martial as more of a free roaming forward. Use Antony on the right and Bruno with freedom towards the left. It might be a shite idea, so perhaps just bench him and use Martial down the middle and Rashford down the left with Antony on the right.