Hello. I think it would be a useful addition if you could show more Info about the prereq. Technologies in tooltips for buildings and ship. Maybe only if you use the ALT Button while hovering the icon to keep the tooltip small. Especially new players who don't know the techtree from start to end would benefit and they wouldn't have to search a few minutes to find the tech they need in the techtree.

Another thing you could add is a feature that jumps to the techtree and highlights (yellow glowing border around the tech-icon?) the needed Technology if you click on a building or ship that nees further research to be built. This would speed things up extremely and make it easy to find the proper techts to get the ships and orbital structures you want.