The only thing I wish, is us getting some control over Evolution&Spawning. And a mechanic for it has already been shown with Evolving Oathbound Aspirants.
My idea:
1. The points are mentioned on the UI. Call it "Infected Biomass" or something.
2. Units are spawned and upgraded via strategic operations
3. These strategic operations cost very little Energy and Ops Points, but serious amounts of "Infected Biomass"
4. There should be a limit how far you can bank. Either a hard cap after wich nothing counts anymore, or units spawning as they do nowif you go too far over the indented storage amount
5. Optionally this can be expanded to also cover all Xenoplague Operations and mods, but that might be to big of a balance change.
I actually tried making a mod for this. Lacking a proper UI, I would have stored "Infected Biomass" as a buff on the Commander.
But I was entirely unable to detect the death of Infected unit or disable the current spawning rules, so that idea failed.