We can say that Mason Mount is a promising player because he is 24 years old. Chelsea will want to keep him first, as he is one of the players who benefit Chelsea. If he cannot keep it in the team, they will not approve his transfer before the transfer fee they will earn from him is high. If Manchester United makes this transfer, the burden on Rashford may be lessened.
I dunno why many MU fans are blaming this transfer like they are all disagreed with the come of mason mount to the manchester united. ETH knew how to develop mount even further and that's why ETH was looking for him to join in the club.
Many people are losing their mind caused by mount has the worst season last year. I really support this transfer. Even though ten hag is now looking for an alternative for mount if chelsea will not agree with such price.
Ten hag is still putting masom mount as the priority for the club right now. It seems like ten hag really wants him to join in the club started from next season.
MU can still use him as long term asset too as long as mount will be well developed in the MU.