I think Martial needs the early, hard pass up to him to be effective. He loves the ball to feet, and then he likes to take his man on. Our build up play has been too obvious, which allows the defenders to stand behind him and foul him, as all 3 Wolves center backs did in rotation. Martial also needs a Pogba or Mata to lift a pass between lines or into a tight space for him to chase. If you watch him in the first half of most games at least recently, he is moving laterally a lot, dragging his marker around, making darting runs, but the ball almost never gets to him, so he stands and waits for it because that's what the other players have shown him they will do with the ball.
Martial's talent was easier to see when he first joined United because there were better players around him. I look forward to seeing what mischief he and Bruno can get up to, not to mention having Rashford and Pogba back will spark new life in him. I don't think Martial is lazy I think he has had to adapt his natural game to a bunch of pub-level players.
When we signed him there were Ballon d'Or clauses put in his contract and I remember non-United fans laughing over this, but there were quite a few early displays where you could conceivably see United having to pay out on that clause. Why has he gone to seed? I think it's the dross around him.