definitely
couldn't mod without one but would feel lost even just as a player without it. I don't know if you're @ all interested, but I could email you the way one of mine looks mid-game.And as "why the spreadsheet" -- because it has cells of information, you can have a row for each player and even through a long game, the info stays all together (just clicking the pointer on a cell displays the entire contents therein without taking up all the screen space for everything).