Increases our chances of maybe sneaking 2nd in a group of 3rd to drop to europa league all is more money for the club
Tweaking the squad we have would allow us to do that and I would imagine that continual improvement would always be high on the agenda anyway, however the only way I see us spending 5-10 million on a player again is for someone who would have huge sell on value (IE Kent).
While it will be nice to be back in the CL it will be an experience rather than with any expectation of us actually progressing to the latter stages.