Playing around with the game a bit, I've noticed a couple annoying things about the Rebel TEC diplomacy tech tree. First off, the technology that gives you pirate mercenaries, and to a lesser extent the one that causes the rebels instigated by the insurgency technology to relocate to your capital, don't have a turn off button. If something's going to cost your limited resources, it needs some way to turn it off, but so far I haven't seen an option for either one of those. 

Also, regarding the pirate option itself, there needs to be a way to control where they spawn, or at least a way to always know where they're going to spawn. The Insurgency one seems to spawn all the units at your capitol, but the pirates spawn anywhere, and if you've take the research that allies you with the neutral factions, it can be difficult to tell where the pirates have spawned.

Finally, regarding the technology that allies you with the neutral factions, there seems to be a bit of an issue with that and the Occupation victory condition. Since they're apparently considered a neutral faction, if you get that technology you can no longer win with that victory condition. The only test I've managed so far was with locked teams, but unless there's some way to break the alliance, if seems that research can be a bit of a nerf.