First off, is there a difference between the original Star Frontiers (which I have never seen) and the pink "Alpha Dawn" set?
Second, melee combat uses half of your STR or DEX (you choice each time you use it). Why only half? Is the assumption that your character is more used to lasers, etc? If your character was used to bare-knuckle brawling, an archaic combat enthusiast, etc., why wouldn't they get the whole attribute score?