I know that.
I'm just thinking about the upkeep-row at the header of the interface.
There are some very ugly numbers that can't get removed.
In the Gameplay Interface options is the row "COLON_GOLD_INCOME_RATE".
By normally editing you just can remove/change the text in front of the "100%" number that is shown ingame. In addition, you can recolor this number by typing a "|cff(RGB-Code)", but my map has so many lights and shadows that this doesn't help^^
Another interesting point are variables. It would be cool if a part of a tooltip text would be able to get a number of a Real / Integer / String variable.