It would be pretty useful to know exactly how many people were hired by the company after scheduling more aircraft. So, the feedback the game would give to the player after he scheduled another aircraft and clicked on "set to 100% staff" should be like:
" Added (xxx) new pilots
Added (yyy) new cabin crew
Added (zzz) ground handling" and etc.
For the same reasons, and also for feedback purposes, the game should give feedback on how staff were moved after clicking on "balance staff between bases". Currently, no feedback is given when this task is performed, so the more distracted player or the one running airlines with a lot of bases won't even notice if anything was done after clicking the balance staff link. It should give a feedback like:
"Balance staff done successfully:
Moved (number of staff) (staff type) to (new base 1);
Moved (number of staff) (staff type) to (new base 2);
Moved (number of staff) (staff type) to (new base 3)" and etc.