star rating is better for positions you don't plan on training...but if you train a certain position you want them to have a high potential otherwise you're just wasting your time.
OK, but it's still relative, right?
I mean, A player who has a A- rating, but only a 2 star potential, should be better than a player with a C rating and 5-star potential. Unless you train the latter for 2-4 years...