One of the most annoying factors of Demigod so far was the fact that killing heroes, units, structures, etc. doesn't really tell you how much gold you're getting in a clear way. It shows a bland, white text of "___ killed ____ (+???)" when killing a hero which is sort of frustrating to see sometimes when a pop-up box with the name of a unit you've clicked on is covering it up almost entirely. I'd like to see some sort of crystal clear, but perfectly simple, visual representation of gaining gold. The generic (+??) above a dying unit would be nice, but it would indefinitely clash with the text showing how much damage you dealt.
My suggestion was a little box in the bottom left corner of the screen that you can open and close at will that displays recent gold gains, and perhaps tell you how much gold you're recieving (via the gold-over-time) per minute. This way you can see exactly how much gold you get from killing a tower, without having to stare mindlessly at your current earnings and see how much it goes up by.
Another very helpful possibility is in your options, being able to change the the text above enemies that displays damage and make it show gold instead, or show both, or show neither.