Do you truly think our midfield will have 3 completely new players in it bought in 2020? Not a chance. No idea why anyone makes potential lineups without McTominay in it. The guy was excellent this season before injury and is a long term starter, no matter the manager. I dont see anyone dropping him as long as he keeps up as he has.Grealish has played as a 10 in games and he's been just as good as when he played 8. As for the bolded part, just watch how Pochettino used Eriksen in games.
If we sign a DM we can still play 4-3-3 with Bruno and Grealish ahead of the DM. Or we can play 4-2-2-2 with Bruno and Grealish as right and left attacking midfielders
A 4222 with 2 slow #10's in the 2 behind the striker is also pretty shit tbh. Wouldnt work. In a Pochettino system, I could see similar to how Poch used Eriksen and Alli with Grealish and Bruno... but the balance isnt the same as that, and our other 2 are Rashford and Martial, not Kane and Son (Kane being the main difference here).
Whatever way people put it, signing Grealish when we just brought in Bruno Fernandes doesn't really make much sense if we're strictly looking at our starting 11 balance. If we feel hes that good that we can't miss out and "we'll figure it out", then fine. But at the cost of signing a right winger or a proper deep lying playmaking mid would be a bad decision