rhinoinsomniac wrote: i quite enjoy that they can be worked to death and experimented on but the morale penalties to everyone except Gremak bothers me. i need to test whether that penalty is permanent and if not how long it lasts.
The effect stacks with each purschase of slaves, enslavement, overwork or experimentation but is temporary and decreases over time
It also probably effects the oppinion of the overall races of you displayed on the diplomacy menu (this is just a guess as the number there is not broken down) and this in turn should affect how other races approach you in diplomacy
You cna also counter the negative effect by fereeing slaves, building markets and researching moral boosting tech
Ensalvement of minor races is intentional for balance sake: some of these races are purposefully there to limit the usefullness of the planet
Some races outright ignore slavery altogehter (besides the Gremak): you can find minor race as major race (Tinkers) that don't care at all and you can combine these races well if you aim is to build a slavery focused empire: but you are right, you best enslave everyone else in this case