In my opinion, Bruno will play in Eriksen's position, while Mount will play behind Striker. Bruno will start the build-up of attacks from behind because Bruno is a typical playmaker so he is the one who flows the ball from the back to the front, while Mount will move freely behind the strikers looking for and opening space and has a high enough scoring instinct so he can score goals when the strikers experience stalemate to score a goal.
Your analysis looks good and even like a coach, but I don't think you are a trainer here even though what you say looks unique and good too. However, it is also difficult for everyone to know what tactics the Manchester United coach will use next season, even though in general you know where the players are now, this can still change next season because the coach knows better when placing players. Not the fans.
I like your analysis about the way they will play... But imagine a double CAM role for Mount and Bruno, with Casemiro being the sitting Dm!!! Because Bruno can score goals and assist well too and i am sure both CAM's track back enough!!! Lol... in my opinion the attack will cook and Manchester united will be so unpredictable moving forward!!!
I think what you are saying is also more accurate because in the previous season it was also clear that Bruno could also score goals and also provide assists well, although sometimes this also happens very rarely because Bruno usually prefers to score goals himself when the opportunity arises. And I also prefer Casemiro to play in the middle, because he is also very experienced in that position.