I like this mod, but I guess I have to uninstall it.
I ran into the issue of not being able to terraform a volcanic world, and from what I could gather from this thread, it was because someone tried to inject his overbearing feel for immersion into this mod. The domain was described to be on an clarke-tech level of planetary- and mega-engineering capabilities, so turning a hot, tectonically active planet into something more habitable is surely not out of scope for them, especially since this mod is already far away from any realism. Turning a baren planet into a waterworld surely is an entirely impossible feat to accomplish within 400 days, or to give it an atmosphere. So on the issue of time alone, this mod is over the coocoo's nest anyways. The argument about "meaningful timeframes" therefore is mute to me.
On the fluff side of things, turning a volcanic planet habitable is easily manageable from a domain POV, especially since they are cannonically known to have set up floating continents on gas giants of all places. All it takes is some crust engineering. Either increase its mass with asteroid regolith, to have a thicker, cooler crust (negative side effects may as well be high gravity / no low gravity),resulting in normal tectonic activity, or introduce artificial nano filaments, which move down into the crust, and culminate into a thick metallic layer, to strengthen the crust vastly in most areas, and leave intentional weak spots under giant geothermal complexes to release the planetary pressure from its mantle, and turn it into industrially useful energy in the process.
And beyond that, we have even more esoteric fluff to justify it, given flux coils, p-space and planet-wide projector systems like the planetary shield. Cooking up some sciency-sounding fluff to take the heat and put it somewhere else, as Patrick would say it, is absolutely possible within the lore, even on a planetary scale. Key being to not take yourself so god damn serious, and put gameplay first.
If that isn't possible, I'll have to bite into the sour fruit, delete my campaign, and switch out this mod for DIY Planets. No loss for you, just a non-necessary waste of my time.
/rant
Otherwise a great mod.