I think he wants to recover the ball high and get the ball into the opposition third as quickly as possible. With the intention of then creating through quick passes and creative wing play in the final third.
He has struggled with the physical demands of the English game. The ruggedness of the Premier League allows for far faster transitions in play than the Eredivisie. This means that when those quick balls are sent up from defence to the attacking third, where at Ajax, possession would be kept due to Haller, Tadic, Gravenberch and Berghuis having the time, space and physicality to retain possession or win duels, in England that accounts to a 50/50 situation; which can easily lead to a counter attacking opportunity for the opposition.
The idea behind playing with 2 free 8's, was to provide 2 central presences that could provide passing options to the central striker, allowing for easy movement and fluidity across the front 5. However for that to occur, the ball needs to reach the final third, which is not a guarantee given the physicality of the league. This also comes with the added downside of leaving the midfield exposed when duels are lost because there are reduced numbers at the back and in central positions to protect against the counter.
The immediate solution for Ten Haag is to revert to the 4231 as it offers protections against these central threats. This may result in us being more defensive than he would initially like, but we would be able to ensure enough solidity to be a strong team. It also forced a heavy reliance on wide players for attacking solutions. ETH has to find a way for Bruno to be a strong part of his creative solutions in attack outside of the counter attack. He'll also need to find other creative solutions in our attack outside of individual abilities and the counterpress. For me, last season was a result of a poorly thought out risk taken due to past success in the Eredivisie without a true recognition of the nuances that make that formation and tactic combination so reckless in England. This season, he needs to build on when he did in 2022/2023, reverting to the 4231, accepting the use of individual brilliance, whilst also looking and finding new attacking solutions in new spacial movements and combinations.