This is clearly one of the advantages because indeed with Ten Hag not being aggressive in looking for players, this is clearly a pretty good opportunity for the existing players.
Rashford's form this season hasn't gone well as the difference is clear compared to his previous form but maybe now with Ten Hag's cool hand he will fit in and hopefully like that.
The 2021/22 season did not go well for rashford and it made his chances of going to the current world cup even smaller, I agree that rashford is a pretty good player but since the arrival of ronaldo it seems he is difficult to compete in the front row of manchester united, right now With the Ten Hag, of course, Rashford has the opportunity to restore his performance and Rashford should be able to prove that he is worthy to remain in the Manchester United main squad next season.
He didn't get more confidence last season and was on the bench more but maybe this season will be a little different, considering in this case Ten Hag said that Rashford is in his plans and it is certain that he will be given more confidence for next season.
This also indicates that indeed Ten Hag still wants the young squad at Manchester United to play well for future progress and of course this is something good.