minerals, a game design decision

[Pocus]

I always wondered why in SE IV there were 3 kind of resources, but with an enormous inbalance toward the consumption of minerals. After 3 patches which never reequilibrated, even slightly, the usage proportion, one can think that this is a voluntary game design decision from Malfador.

So why 3 resources if in 95% of the situations only minerals is really relevant as a limiting factor?

Also, why no modders tried to put more equilibrium, like using radioactive massively for all engines and supply storages? Or more organic for troops? Anything really is feasible.