I was wondering the same thing, also have not seen any difference

I am also curious, it costs a lot of resources but it doesn't seem to add anything damage-wise. I have the feeling it is supposed to increase the counter-attack damage since I've seen that there are creatures with a "Vengeance" special ability that increases counter-attack damage.

Yup

I'm thinking it shows up when it's not suppose to and of course has no effect until you research the proper tech, then the +3 damage is added but yeah for the most part don't add it unless you see a stat boost.

Doublepost.