^Yeah, sporing out that Class 45 planet. What's the problem in sending in a fleet of fast transports, using Tidal Disruptors, and taking 45 tiles of land instead of spore-bombing the place out into a toxic world?
Dread Lord population shouldn't grow at all according to the back story
It must be the population of minions that is growing. Evil lords of all kinds always have loads of minions, right? There's probably only one real Dread Lord on that whole planet, creating minions left and right and making them do his bidding.
I wish the Dread Lords event were radically different. For instance, they could appear as a superpower all over the galaxy and spend a random number of turns shooting up everything in sight and kidnapping planetary populations, then simply disappear, leaving chaos in their wake. Something awe-inspiring, like a typhoon - a force of nature that carries all before it, then is suddenly gone.
Your probably right about the population. In The Reluctant, there was only one Dread Lord on Earth, Lord Vagath, and the entire invasion failed when DL Bradley(i.e. Draginol the Mithrilar) killed the one and only true Dread Lord on the planet(along with 3 minions).
It would make sense for them to kidnap planetary populations - they survive by using the life force of lesser beings to extend their lifespan, which was the cause for the Dread Lord - Arnor war.
I wish the Dread Lords appeared just as they are, but with a fairly large max-tech battle fleet to hold off cheap-planet invasions. Since they already have Precursor tech, don't understand the meaning of 'culture victory', and are in no way diplomats, they should be out to conquer the galaxy and actually win a military victory.
I also feel that the Dreads should have some inaccessible tech that can only be obtained by capturing their planets - like bio-mechanical hulls(high repair rate, high HP bug-hulls), Precursor-level miniaturization(30% miniaturization bonus), etc. etc.
Seeing as all races have unique tech in Twilight of the Arnor, I'm sure that the Dread Lords will still be superior even when the normal races have maximized their own lowly technologies.