Busi last season chased the ball a lot to win it early and FDJ covered him.
Often FDJ was the deepest midfielder of the two.
FDJ is intelligent and would play in the spaces that would allow Busi/Balde and even Gavi to get more freedom.
Pedri and FDJ when on occassion have played as a pair have dominated the games.. Gundo should slide in and allow for same. But will take some time to settle.
They shouldnt set up with a sitting DM. Dont have players for it really.
In that scenario (and I agree with you) then we should put the 8m on Fabricio Diaz. Not an out and out DMC but his main defensive attribute is anticipation.