Yeah, when I made that tactic which was way back in October, I wasn't trying to replicate Erik ten Hag's tactic, but just to try and make a consistent tactic on the match engine at the time which was very hard to do back then. For some reason, Rashford performed really well in an IW role at the time, and we both know he's naturally an IF with his role and the way he plays IRL, but if I were to make an Erik ten Hag tactic replication, he'd definitely be an IF. As a matter of fact, this is how I'd make a EtH replica - or as close to it as match engine allows. I'd be shuttling RB into Segundo Volante on support for when we have the ball, but it defensively, it's too different to what it looks IRL.
2 points of personal debate would also be Antony's role and Mount's role. While Mount's role should be more of a box-to-box role, he drops deeper than I'd want him to in that role, which is why pass map would look a bit worse. And Antony IRL is always hugging the touchline, and cutting in when the opportunity arises. As an IW in the game, he does that far too much. As a winger, he still does it because he has the "Cuts Inside From Right Wing" player trait, but to a far lower degree. Dalot is underlapping him, but because of match engine limitations, he still comes from an initially wide position, which causes RW (Sancho in this instance) and him to have the same position on the pass map. If match engine wasn't as limited in that regard, he'd be more narrow than RW.
But, as you can see in game, on the screenshot below, this is the perfect replicated shape of EtH's tactic (IMO). In this very instance, Varane passes the ball to Sancho, Bruno drops deep to receive from Sancho and plays Dalot through who is making an inverted run, who then crosses it low to the far post for Rashford to finish.
But again, I have to reiterate you've done great job with the replication, and have come closer to how Erik's team sets up than most people I've seen online, as you're the only one to notice the 3-1-6 shape. I've meant no critique to you whatsoever. Unfortunately match engine doesn't always guarantee exact replication and good results.
Kinda similar to how match engine doesn't allow Guardiola's tactic replication with the 3-2-5 shape. As you know, Stones only starts as a CB, but ends up playing as a midfielder, and City defends in 4-4-2. No way to replicate that. It's a 4-3-3 which turns into 3-2-5 and is a 4-4-2 while defending. Absolutely impossible to replicate in match engine entirely. I'm really hoping for this to be addressed to some degree in FM24, but I don't think that game will be introducing a lot of new things. I think most of their focus will be directed towards FM25 with unity engine.
If you wish to speak more, you can DM me and I'll share my discord with you and we can brainstorm a bit.