This would severely screw with game balance as it would strongly incentivise many small modules over a few large ones. I think 15% is pretty clear personally.

I'm not sure I follow here. There isn't really a baseline for something like economy or research, it depends highly on how you run your civ. And anyway, would't this just be a line that ran 20% above the baseline (for +2 economy for example)? Does that really give you more information than the "+20%" that is currently in the tooltip?

Your point didn't really need to be clarified. It was quite obvious what you intended.

The problem is that life support scales with map size (or did in GC2, we don't have maps big enough to test that yet for GC3). On a dinky map, your +1 per module roughly approximates the percentage addition, closely enough so that it may well have been used to calculate those percentages in the first place.

Life support gives MUCH more range for larger maps. Getting a 10% passive bonus on an Immense map was 5-6 spaces additional range, not 1. That's the sort of map your system would fail at, but it's not immediately obvious *why* if you aren't really familiar with the previous game.