Not sure if having 2 more +1% talents is a good idea their not really exciting. That said i think all 1% in the technology tree need to have a lvl 5 and 10 bonus at least. Though the old fashion % bonus talent trees are getting phased out and have evolved into giving ability's maybe a little hybrid might be nice. Though that's the least of star-sector problems creating a campaign that has depth, territory(planet) control, bosses, aliens, random procedural generation(map), high difficulty etc.
I remember playing EV Nova long time ago and attacking a planet and getting *** haha. If you are ever going to add that maybe when you attack a planet you head to the battlefield and fight waves and waves.