So call me a big fat Space ####, but I often like to rp my Aurora games with Slavery not only allowed, but state sponsored. Currently they only really work as big and difficult to transport construction brigades, and thus can only build installations/PDC.
It could be nice to have further rules for the idea of slavery in general. Perhaps it could be made so that the slaves can be brought to a planet with minimal to no infrastructure and act as a disposable population. That way they can man installations (Each unit costs 10,000 population to create, why not have them be 10,000 of population for labor as well), such as mines or terraforming installations. (does it make me evil to want the filthy xenos I crushed under my Jackbooted heel to serve me in defeat?)
I do like the idea of the forced labor units in creating a rich dark rp environment, I just wished for a bit more options with them.
That being said, they do still work rather nicely as the transportable construction factory, sans the infrastructure/building/population, that they currently are. If I am the only bastard evil enough to even use the FLU then so be it and I'll be content with Slavery as it currently stands.