Woke up defensively once he missed the 2nd sitter. I do think he should go play in a 2 up top system and score a ton of goals for like 50M to I dunno, Sevilla or Roma, but I prefer him at LW trying to score goals than as a 9 so we aren't toothless in the box or aerially with him up there. Rashford has been good on the right but probably makes sense cutting in from the left and Diallo and Greenwood are left-footed (and Greenwood may not be a conventional 9 for a few years with Cavani and we'll want a replacement proper 9 target type if possible as an option at least) and Dan James is around to back up Rashford on the left, so yeah I'd probably sell him, direct the money to the massive centerback and #6 purchases we need and buy a 9 say after 2 seasons of Cavani.
He might score a lot of goals this year as Cavani and Bruno look creative, Rashford scares defenders on the other side more and Telles commands respect to his left on overlaps, but we could also probably just shift Rashford out left and throw Greenwood out there on the right and he'd get the same number of goals as Martial and 85-90% of the overall play since Martial hasn't really grown a ton as passer, presser or defender and his off the ball movement ain't great. Could even use Bruno narrow on the left with Telles pushed up so as to get Van De Bee or Pogba as a 10 type and really are you losing a ton? And when we play on the break James isn't a terrible option, though definitely you'd expect a drop in goals. And Diallo is coming in January.
If there was ever a player to swap for a solution elsewhere, like if Atletico would give up Koke to play alongside McTominay or Fred or Real wanna give up on Varane while he's struggling or something like that, it's Martial.