I think Sandro needs another chance, just not as a striker. When he's played, he's looked like he has zero desire to get into the penalty area. Obviously, we're a bit of a mess and Koeman's "plans" didn't flatter him, but that's still disturbing. Especially given this, from before the season:https://differentgame.wordpress.com/2017/07/04/the-data-scout-sandro-ramirez/
Like others have said, it seems like he's better suited to being a wide forward, especially since we can really use someone who can pass into the box.
I think Rooney is the best player in the CF role for the time being. He's good for possession purposes and, despite having lost it physically, he still has the best penalty box instincts of anyone at the club.
Edit: I still don't know why we didn't go for any of Iheanacho, Abraham, Haller, or Mounie. Four reasonably good fits that moved this summer. Even someone like Giovanni Simeone or Duvan Zapata would have been interesting. Getting this
close on Giroud doesn't excuse any of it. It stinks.