He played 3-5-2 at inter though. We have 4 forwards contributing goals instead of 2 so the expected output from midfielders is less. If our lowest scoring forward (Kulu) gets 12 -15 goals then we only need 3-6 from midfielders to replicate Inter numbers.Barella & Brozovic contributed to 18 goals between them though, that's more than we are likely to get from Bentancur/Bissouma (our expected partnership). Barella especially has a much more progressive passing range and will make those attacking runs from deep.
And he also had Eriksen in a deeper playmaker role at Inter towards the end. I'm not saying we need some lightweight #10 type, but I do think we're still lacking a player who really wants to be involved in an attacking sense.
And that was in a title winning side. Which we will likely not be.