Pick your players you want to build a team around and play to that, Koeman and to a degree Unsy have just tried to force room for certain players. We have so many players, we just need a bit of stability. 433, 4231, 442, 4411, 352 - whatever just play players in their correct position. Never forget, we started DCL at RWB, still begs beyond belief.
4411
Kenny Keane ??? Baines
Davies Gueye Beni Lookman
Sigurdsson(Klaassen)
Niasse
442
Kenny Keane ??? Baines
Lennon Beni(Gueye/Schneiderlin) Klaassen Lookman
Niasse Sandro(DCL)
352
Keane ??? Holgate
Lennon Schneiderlin Klaassen ???
Vlasic (Sigurdsson)
Niasse Sandro (DCL)
And I do think 3 at the back is worth trying against certain teams, as long as Lennon plays as the RWB and Holgate plays in a back 3. Although it seems to make Keane worse. I could never get over the times we had 3 at the back and started Holgate at right back, despite his success in a back 3 (i.e City last season). Never included Davies in any of it, but he really can play anywhere in midfield...
Just stop the favourtism.
And whatever formation the new manager persists with, it MUST NOT INCLUDE ROONEY. Sigurdsson, Vlasic and Klaassen are all better fits. Don't forget we get Coleman and Bolasie back soon (I hope?), so 4 at the back with Coleman and Bolasie linking up on the right with one of Sig and Klaassen tip/tapping around with them would be perfect.