& to an extent the fear of what Grealish might do has already also opened up a lot of space for others, but you need a no9 who can hold the ball up when we are under pressure &/or can finish the only chance he gets in a tight game?
That’s their main job
We have a midfield who have hardly been prolific goalscorers (humour me - compared to Cahill, Osman, Arteta, Fellaini…..) so the striker needs to score more than just tap ins to make a real difference.
I hope you’re right & I’m wrong, but I just don’t see it with either of the Bs at present