Is there a way to mod this?
I find that recovering techs after battle can really destabilize the whole research process. This is especially true in large galaxies with lots of worlds, where a relatively small section of conflict going badly for one side could result in a huge tech jump for the other.
It also means more time spent bulking up to prevent tug-of-war battles that could easily homogenize our respective tech trees. Thing is, I LIKE that kind of rough stuff, but I would prefer to leave gaining new techs up to the scientists on both sides.