Mason Mount is a young player with great potential and I think Manchester United are very lucky to get him, at the age of 24 it is possible for this player to contribute big and long to the team and can even be a good investment in the future.
Mason Mount is a Chelsea player who has amazing statistics on Chelsea's high press defense game during the Tuchel era.. His pressing and counter pressing statistics are high.. Mount has excellent pass through ball techniques, cool free kicks and good corner kick techniques... Agility his game was required in the Eth-era Man United Team. Still young, 55 million pounds plus adds on 5 million pounds. Is a good bargain for Man United.
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.
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!!!