So you want Levy running the football side of the club?
We've NEVER had a DoF to oversee and have the responsibility of the Football side of things. They have all had specifically defined roles mainly around recruitment (purchase and sale) and scouting.
Bit of an oxymoron analogy you've made their if I may be so bold as to point out. Whoever the DoF is, if he turns out to be shit, then it is Levy's fault, you've just correctly affirmed this. It's his responsibility and will be judged accordingly on this hire.
But right now, we have or officially about to have (not until 1.7.21) a DOF to oversee EVERYTHING to do with Football. The responsibility is HIS and his alone, this is what we've all be crying out for ages! His remit is far-reaching, many of the things he will do will be unseen and probably never discussed unless they are positive.
It would be really refreshing to have him have run a few press confs on his own to talk about what his plans are, so we can manage how well he's doing. I've seen several DoF's do this in Spain and Italy previously but for whatever reason, in England, there's always a complete media blackout surrounding their work.
But the reality is, there will be no debating whether it was the Coach's hire to bring in player 'x', 'y' or 'z'. There will be no debating whose fault it is that sold Jonny to Juve and then they become a world superstar. There will be no debating why the academy is not producing talented footballers that make it to the first team or generate great income for the club.