Sometimes I do a mission or go hunting, get back to town sell my stuff and chat blah blah. When I log back in I don't know if I scanned or not so just to make sure I have to go back and do it. I know this is not expensive nor even that much of an effort but I would also like to be able to scan, do a mission and know how much exp I have earned in that time.
How about implementing a small little line that appears in your EXP bar in the place where you last scanned. It would also show you how much you have to lose if you're in a tough fight.
Could be a client side thing that is just a pointer to the percentage location of the exp bar..it doesn't have to effect exp in any way, it's just a little graphical thing.