Yeah but you don't want clones from generation to generation. It's good if Minato doesn't know the Sage arts, it means he has his own unique style of fighting. Remember he developed the Rasengan himself so he must have done it to add to his armoury and hence his own fighting style.

I think what would be cool is if Naruto learnt some sealing techniques, as that would def take him on to another level. If he could learn how to seal up say the tailed beasts or some bloodline limit (Sharingan pehaps) then he would def be a legendary fighter in his own right.