What does Command stars and other skills actually do?

[Valion]

I still prefer sharp then vigorous, afterall, a general full of stamina, but with low or no command stars is simply not worth it. If he's not vigorous, just let him sit most of his time governing a good province for some extra cash and management bonus.

I prefer Sharp and Charismatic over Vigorous if it can't be helped, i currently have a FM come of age that is Sharp/Charismatic/Languorous that I'm gonna use as a general purely coz he has the understanding of strategy trait and is the eldest son of L.Cornelius Scipio AKA L.Africanus. It will be more challenging to make him a good general but I'm gonna enjoy it all the way. As for command stars being hard to get in EB 1.2 Hell yeah i agree, my current best is Scipio with 8 standing command stars only need 2 more till 10 mwahaha and that is without any modding just pure hard rigorous and HUGE battles