This is a great mod. It is working quite well and I love the defense considerations it creates. It certainly makes it much harder to just solve and forget about Vulcanus.
I'm currently running a campaign where I rushed to Vulcanus without any advanced tech. The default settings might be a bit overtuned for that. It is quite difficult to create the sort of automated defenses without railguns, tesla turrets, or even uranium ammo that can handle even the small demolishers when their health is increased 150%. That coupled with the relatively short cooldown time makes it rather problematic for a single player with limited tech to break out of the starting territory and secure more territories. You might want to consider tweaking the defaults a bit. I currently have it at 0.75 small demolisher HP and 20 minute grace period and feel like I'm able to make some progress now.