Leveling heroes gets repetitive after a while. It would be very nice if you could set a heroe to 'autolevel' on their management screen. 


The player would then set which skills the heroe should go for when leveing. The player would select from one of the categories that describe the skill tree (i.e. fleet management, empire management, industry, science categories). 


Alternatively, the player could let the AI choose the fitting skills. These would then depend on the heroes assignment: heroes governing cold systems select science- and population-increasing skills, heroes governing hot systems choose industry- and population-increasing skills, fleet admirals choose fleet management skills, and so on.