Here are some numbers from the Opta data.
With Dembele as an attacking player we averaged 1.29 pts per game. With him as a midfielder that figure was 1.42.
That is points per game with Dembele in the deeper, central, role, and points per game when he played as a 10 or wide.
We were a bit better with him deeper, maybe 4 points a season off the top of my head, which is not insignificant. If you pull off three little tricks like that as a manager you’ve been seriously clever.
Maybe. In truth it’s probably not a significant difference, but still.