Personally, and I know its a minority view, I think we shifted away from 3 at the back; having spent the close season setting up for it and abandon it after one home defeat was too much too soon. Esp on another day we would have won that game with the chances we created. Since going 4141 we have become progressively worse; weaker at the back and painfully slow and predictable going forward.
Possession is ok, as long as we either break swiftly and aggressively when we first gain possession (we dont) or have the guile to be patient and carve teams open once they have packed their defence deep. Only wes has the ability with Pritchard missing - Maddison doesnt seem to have that change of pace ball wes can see. At the moment possession in our own half is too easy to defend against and Nelson not physical enough to create space and bully defenders in that situation.
Short term I would revert to a stronger mix of being more direct going forward together with reverting to the original 3 at the back, allowing them to gather some understanding protected by a pair of deep sitting defensive midfielders, allowing steipermann and pinto to add some width. 3 from klose zimmermann, Franke (who will improve once on his preferred right side instead of martin) and Flint (or similar) and 10-12 games to gel and adapt should work longer term. And we have to look longer term here, 3-5 games is too soon.