Drop the 343 bollocks because you know for a fact that would see Son stranded out on the left flank offering f' all and Johnson most likely hugging the right ghosting through games.Totally agree. I also consider this squad to be handmade for some variation of a 3 at the back.
CBs: Romero and VdV are already doing a good job at the impossible task of trying to defend in a back 2. Because that's what we play right now. 2 full backs marching forwards, no holding midfielder dropping between CR and VDV. As soon as we turn it over these two are faced with covering the whole width of the pitch, until full backs get back at least. I assume having another CB between them can only do good.
WBs: I also agree that Porro and Udogie are well-suited as WBs because that's essentially what they're right now anyway. Only difference is they can't freely hug the touchline like actual WBs because there are wingers in the way. If those wingers don't offer much threat with the ball anyway (they don't), then just getting rid of them and allowing Porro and Udogie to have the entire flank for themselves will probably make their job easier. At least in possession.
MCs-AMCs: I don't want to spend much time talking about them as I don't think their responsibilities would be vastly different in a 3 at the back compared to current 4 at the back we're playing. Just take your pick of 2 or 3 among them depending on scoreline, opposition, conditioning and so on.
Striker: Now that's interesting. IMO none of our three main wingers are wingers in the more traditional sense. Especially Johnson and Werner are very limited on the ball. They don't have much tricks in their sleeve when taking a defender on 1v1. They barely beat their man and deliver a good ball like traditional wingers do. I don't think they belong to this team but if they have a saving grace, especially Johnson, it's their off-ball movement. Solanke is an all-around striker who's suitable for a target man / decoy role. Bringing these two together, I suggest a frontline where Solanke as the lone striker is closely surrounded by runners like Werner, Son, and Johnson moving into openings created by him. Even the likes of Maddison or Kulusevski can be fitted into this role. As I said it's not great. I would rather not to see the likes of Johnson and Werner on the team but since there's no immediate fix available we might as well try something different to fully utilize their strenghts.
So, all things considered, I'm imagining something like this:
Vicario
Romero- Dragusin- VdV
Porro-----------MC--------MC---------Udogie
X----------Son
Solanke
This current 4 at the back, with wingers offering zero creativity, midfielders leaving 2 CBs totally exposed, everybody mindlessly pushing forward, Solanke often being left alone inside the box stuff is not working.
Go 352 with Maddison central attacking, Solanke and one of Son or Johnson playing through the middle but without the burden of being a lone striker. Ask nothing of BJ/Son other than find space and finish, that's all they're good for so we should find a system that exploits this. Even Werner could fulfil this role to some degree.
Anything that demands guile/creativity on a consistent basis from these guys is doomed to fail.