[Taqwus]

Better handling of undead. I'd like to see processes where a unit retains many of its characteristics including shape when being reanimated rather than becoming a Soulless, Mummy or Wight Mage. Add the Undead flag, add weak Fear, hm. Perhaps horror mark depending on the process... or ethereal for those bringing back a shade rather than a corporeal form. Oh, and with insanity being supported, it might not be unheard of for the beneficiary to be insane. The Outer Gods act however they choose...

Given the horror of necromancy possessed by many societies, I'd wonder whether reanimation and the presence of undead (except perhaps those hidden inside a fortress?) should be grounds for unrest for numerous nations.

One might wonder about necromantic divination, but unless the dead are tracked by previous owner, this would be tricky to implement well (e.g. reanimate and interrogate the dead belonging to another faction to learn about the extent of their empire, etc).

Perhaps different classes of immortality: e.g. several flags about it. Flag types might cover where respawning happens (capital, place of death), restrictions (died in own dominion, faction won battle, not killed by fire, not disintegrated), and speed (minimum number of turns of delay before resurrection, probability of resurrection every turn thereafter).

I could see a 'dark cultic' theme for R'lyeh: necromancers, alchemists, Dagon cultists, dreamers, the occasional inhuman assistant, perhaps even an avatar of Nyarlothep as a pretender type, and maybe Joseph Curwen or Abdul Alhazred (astral, death, blood, unholy... and insane) as the, er, "heroes". Less direct involvement of tentacles, perhaps chancy unholy prayers used for propitiating the somewhat unpredictable Outer Gods, and a fairly high rate of insanity.