In the realm of very minor suggestions:
Currently paying back loans such as annuity loans is a bit of a faff, since one has to select each contract individually, choose the amount and then click “pay back”. Would it be possible to permit the user to select several contracts and then click a “pay back in full” button? I was thinking along the lines of the fleet management page, where I can perform the same operation on several aircraft (set cabin config, assign pilots etc) by selecting the planes and then clicking only once.
No idea if this would be easy or hard to code - if the former it would save me quite a few clicks and I would be very happy!