Think we saw very clearly how he wants to play going forward and that he's made some decisions during the World Cup:
1. McTominay went forward a fair amount when we had an advantage out wide, and if it was Casemiro there we would have had another goal off of more sober passing. Ten Hag has had time now with Casemiro and seen that he's still got the ability to move forward vertically to defence effect like he did with and without the ball for Madrid, he'll be a Makelele style sitter soon, but probably not for a bit longer (let's say 18-30 months which means in 1.5-2.5 seasons)
2. We're probably buying Gapko and you can think of it as Rashford/Martial/Gapko as forwards, 2 of whom will play, then Antony or Garnacho will provide width (though they play on different sides). So basically our 5 attackers (with Sancho to come back at some point) will rotate and my guess is we won't see much of Gapko as a 9 with Antony on the right since we need wingers who are hungry to get in the box and score goals for balance with Gapko looking to stay out of tussles with center backs and we look to switch play extremely quickly and attack behind and either side of fullbacks and let Eriksen, Bruno and Casemiro join attacks down the middle.
3. Lindelof will be kept over Maguire because he's not a headache, he's calmer on the ball, Ten Hag trusts him more on the ball at LCB (and we probably will sign an RCB since Lisandro is young and durable and Varane is neither) and he doesn't mind being 4th choice CB. We'll sign a proper CB who can pass the ball this summer, though outside chance we move Maguire now if a great offer comes in and we get the extra 10M we'd need to spend to sign a quality RCB away in January. He can always go in the summer of 2024 with a new LCB coming in. If anyone has a firm take on who the next Piero Hincapie is, that would be the type of guy.
4. Frimpong is gonna get signed so we have an extremely attacking RB option that gives us width on the right when Antony isn't on the pitch, so when Rashford is out right but playing more as a striker and Gapko or Martial a tad left of center as the nominal 9. Also for the last 20-30 minutes of games, one of Antony (RW) or Frimpong (RB) will be able to come on when we are chasing a game.