units
Planetary bombardment Capital ship. Why? the planetary bombardment capital ships there nothing more the weak battleships with a small increase in planetar bombardment(without special abilities). But I find them replaced with less resources with a team of siege frigate. They can do the same job with no using a capital ship slot and with fewer fleet supply. Also the planetary bombardment capital needsa more support then any other capital ship.
tech (there is a list of them)
First Mobile Phase Detection (level 5) for the Servun Overseer. This is alomst replaced by highly attuned Sensors(level 8), which sees ever jump, while the mobile phase detection, only work in seeing ships jumping into the system that the Overseer is in. I do like the jump degradtion, both what the point of having a mobile detection system, when you can see ever jump in the first place.
Enslaved labor and optimized construction, mostly enslaved labor. 8% off is ok for metal and crystal, but for the 8% off for the credits from enslaved labor, it is too little.
Raider xenophobia: Reducing the pirate fleet results in less exp for the capital ships to feed on. Meaning it takes longer for the Vasari ships to level up.
Induced Leniency and skilled diplomats: I find this only good for use with AI. There should be something else that these thing could be good for, but I don't know what.
Insurgency: This is the big one, out of them all. High on the tech tree, at the end of the culture line for the TEC, and all it can do is give me 6 ships? Not only that, but the planet must be under your control, which is something the TEC is not strong in. Also those 6 ships attact all sides and act like a neutral faction, and even attacking you. There nothing more then a very very weak replacement for the pirates, if they are destroyed.