@Seven
I understand why Sarri came, he played great football with Napoli and perhaps we'd do better in CL with someone willing to take risks. He failed so we went with Pirlo because he could've been a Guardiola despite no prior evidence. He also failed, but the mistake was getting the dinosaur back in because we have a 3-5-2 squad with a bunch of 'versatile' players and no space for prospects like Soule and Iling Jr to flourish.
Conte retuning is the best short term option because he'll win trophies, but he'll embed 3-5-2 even deeper so the next manager will have trouble with this squad; either that or his name will have to be Inzaghi.
One more (we've been dry for a while now) trophyless season is worth it if we build a team that a higher calibre manager would come to. Bielsa or similar is not the person to take us to new heights, he's just to break us out of prehistoric football and plant the seeds for a new philosophy.