1. Racial troops tech do not require racial tech, so they are seen to all races. Minor annoyance.
2. I think it would be fair to make Pirate Race tech starting from level 1, not 0 as now. The problem is that now Pirates should scrap all their research facilities and SY on the homeworld and build racial ones to get some advantage. Or else give Pirate Research Center and Pirate Docks the same facility families as generic Research Center and SY. Then they'll be able to upgrade Homeworld RCs and SY as soon as they research Pirate Race tech 1.
3. Pirate Colony Ship has a Engines Per Move requirement of 10. Since Warp Nacelle provides 3 standard movement point you need 4 nacelles to achieve system speed of 1. But due to reduced tonnage for Pirate Colony Ship there will be no place for warp drive. So their colony ships will be always moving at speed 1
Is it feature or just an oversight?
If this is not a feature then change Engines Per Move for pirate colony ship to 9, then 3 nacelles + warp drive will fit the colony ship perfectly.
edit: fixed 1.