I'd love to see a way to mark some of the special systems obsolete. . .
Lets face it. . . Why keep using Grav/Geo Sensors when Improved Grav/Geo Sensors are available? Or Jump Gate Construction 180 when 120 is available? Salvage 500 when 750 is available?
While there may be instances when you would, I can't imagine most people will and it would be nice to removed the clutter from the class design screen. . .