Mason Mount is important player for Chelsea but faced difficult get regular position last season and looks not happy stay with Chelsea until his contract over, seems logic when loss position as main player move to other team who guarantee with more minutes playing is the best choose for Mount. Kai Havertz seems the same thing happen for him, including not in scheme under Pochettino has potential for him spent more in the bench and joining with Arsenal will make difference to get more minutes playing.
But still unbelievable with Chelsea transfer activities, they have sell many important players without get balance between player out or in and I don't optimist with Chelsea has promising performance in this season and back to the top fourth standing positon.
Currently, Chelsea and Pochettino first strategy is brought this club in balance because in last season they bought 35 players which was massive burden on these clubs finances and mostly players were not active due to many issues giving them salaries and other expense were creating problems for them as well after offloading few players they need to have look at their current squad and then work on how things will be work for them in coming season because new coaches failure or pass is second thing first they need to work on their squad and things which will bring better environment in this club after worst end of last season.
They still have too many quality players just need to handle them and have good time of playing for them with depth in performance as well with the sell of few players now they have enough money which they can use in future and also can settle their finances which was disrupting in last season.