But I refuse to believe you are not dominating on a standard map with 30-40 Spice
*shrug* It happens. The only thing that determines your spice access is your terrain, time and some luck.
You don't need that much terrain to control 30+ spice resources. You can easily get that by late-midgame controlling only say 1/7 of the world's land.
But you're also digging yourself into a circular argument:
"Spice isn't powerful enough, because if you have lots of spice then you are winning."
Why do you think you managed to be winning? Because you had a big spice income.
I'm not sure exactly how corporation maintenance works; it can be a complex formula.
But it certainly doesn't seem to be -5; it seems to me to be -3 gold. (Note: gold penalties are post-city boosters like banks and libraries, commerce boosts are pre-boost).
So:
0 spice = +5 gold
1 spice = +3 commerce, +(5-3=2) gold.
2 spice = +6 commerce, +2 gold
3 spice = +9 commerce, +2 gold
So when faced with only 2-3 spice pools (that could extinguish or be pillaged by worms) when you already have the firm, early game where there are few multipliers, it's almost useless.
And in any case, if you only have 2-3 spice then you are either:
a) in the very early game
b) using Arrakis paradise civic (which severely limits the amount of spice you can pull in)
c) incredibly unlucky with spice blows and spice resource deletion
d) failing to build cities near the coast or build cultural buildings to expand your terrain.
And can you really think of a way that *doesn't* have this mild problem with the first 1-2 spice? There isn't any easy way to boost the yield of only the first 2 spice resources.
Its a necessary evil given how corporations work.
What exactly is it you are proposing to change?