It is the sheer incompetence that gets me.
It isn't hard to run the playing style of a football club surely:
1. Set out how you want your club to play
2. Recruit managers who have successfully coached in that style
3. Recruit players who can play in that style
4. Ensure you have enough players for each postion
We've gone from Moyes (4-5-1 direct) - Martinez (4-2-1-3 possession) - Koeman (4-3-3 direct) to Allardyce (4-5-1 very direct) and now have a collection of players (Sandro, Klaassen, Schniederlin) who blatantly won't work with Sam's "style". And a youth system packed with potential PL
players who won't get any game time.
I strongly suspect that some of those you`ve mentioned will be getting binned, as Koeman "mistakes ".