Not sure if this has been shared in the 100+ pages, but a decent report on him from last summer gives a bit more on what we can expect from him.
Interestingly the author looks at where he could fit in a Spurs lineup (back when Pochettino was still manager): “He offers something different from Winks and I could see the two of them being rotated depending on the opponent and stage of the game. For example, Winks against teams you can ping the ball about more and expect to dominate the ball. And Berge against bigger sides where you need some more defensive cover and physicality.”
Is he actually competition for Norwood rather than Lundstram? It’s easy to pick the latter because of his form, but thinking about the leaked photo from the PA-CW meeting, and reading more about the type of player he is, he seems more suited to do Norwood’s position – albeit doing it differently to Norwood.