Neither of them is good enough, and in a perfect scenario, both of them should leave the club, but if the club wants to keep one of them, then is agree, Hojlund should stay.
Since he won't be the starter in the team, it wouldn't hurt to have a backup striker. Sesko would be the starter.
I have my doubts about Amorim. He is good, but I don't think he's made for a club like United. I don't see any reason why Mount should be playing as a striker when he has Sesko on the bench. Luke Shaw has no business starting a game like that, too. Fenandes behind a natural striker like Sesko would be more productive.
Talk your talk but never say Joshua Zirkzee is not good enough, you say that then I will be forced to say you're biased lately. As a United fan through and through, there's no way in hell a sensible Manchester United fan will support and back Rasmus Hojlund staying another season. Joshua Zirkzee is the right name to stay.
It's never how far but how well. We will all be alive to see what happens in the future. Mason Mount is a brilliant player, he might be injury prone, but he's one of the players in this Manchester united squad that understands the demands of the manager. More games to play, a lot could change ahead.