This is exactly it.
Our more successful years under Harry and Poch were without a DoF. This system doesn't work with levy in charge.
The only time it has worked was to change the tide under Jol with Arnesen as DoF. It allowed us to move up a level but the gap between mid table to EL is easier to bridge than getting into the top 4, which is what we did with Harry and Poch.
I think we just need a good scouting system that the manager has control of. At the end of the day he works with the players not levy. The scout just goes and finds those players. Levy needs to stop fucking about with getting cheaper alternatives or leaving deals last minute to save a buck.
Sorry the bit I highlighted is just so out of date.
There a number of great articles on line about Klopp not being intimately in charge of player recruitment to the extent that Liverpool's recruitment guys had to harangue him continually until he agreed to accept Salah joining them - and the articles go on to say that he's so pleased that they had done their homework.
Most of our squad problems today come from Poch having too much say over transfers for 4 years, when bringing in the likes of Sissoko, Sanchez, Aurier (these being probably his best ones), Janssen (proudly announced as Poch's own scouting), N'Jie, Nkoudou, Foyth et al......and no players in that time being on the list of 'we must keep' now, sadly mostly on the list of 'please can we get rid of'
And his youth development policy only brought through Winks in 4 years.....giving us an HG issue now, whereas he sold off the HG youth he inherited (Bentaleb, Mason, Townsend, Carroll, Veljkovic et al) some for peanuts but others got £100m+
Poch like many, is a decent coach has shown no talent for player recruitment, and at Spurs no talent for youth development from the academy.
So we cannot afford another coach screwing up squad management which they do not have the time or skillset necessarily to deal with.