The problem with being a "system team" - ie. a team whose quality is greater than the sum of its parts owing to the system and squad unity - is when aspects of it fail, you've not got an awful lot of quality underpinning it, at least at the very highest level. If Newcastle's system fails, they've got potential game-winners like ASM, Shelvey, Almiron or even Matt Ritchie to fall back on. Even among the relegation threatened teams, Villa have Grealish who can take the game by the scruff of the neck. Palace have Zaha. Even Norwich have Buendia and Pukki.
Our issues all feel linked. The wing inter-play isn't as good, therefore Norwood's having less time on the ball, most of the balls are going long either from him or the back instead, and our strikers aren't holding the ball particularly well. Nothing is working and so we're reliant on individual brilliance, which we're also not getting. Fleck is the most likely to provide it but yesterday felt like it was too much of an ask given the long break and recent injury.
So what do you do? I understand if Jags isn't fit the desire to tweak the formation, particularly if something like a 4-2-3-1 gives us a chance of getting the best out of Berge. But I think if he's able to play, there's no reason why we should make large-scale changes.
Personally I'd keep the formation the same, put Jags at CB, Lundstram in at RCM, Fleck if fit at LCM and stick McGoldrick and either Zivkovic or Moose up top. With the exception of the striker changes, I think most would agree. So on the striker changes, my thinking is that McGoldrick provides good opportunities for link-up play. He comes in for McBurnie, whose starting looking like Didsy at times but isn't quite there. Then you want some pace to trouble Man Utd's defence. Enter either ZIvkovic or Moose. Finally, and this is probably the most unpopular one, I'd swap Berge in for Norwood. Norwood has returned bang off it, and if we're struggling on the wings I think I'd sooner have a more athletic player in that position. Berge can look cumbersome at times but he's better in this area than Norwood. I can totally understand if people think it's a bit too radical to punish a player whose been one of our stand-out players this year, but he's not been at the races and with how turgid our play has been, I think we need a boost.