Continuing the cooking analogy, I have used used the same ingredients as my wife to cook the same dish. Mine turns out edible but not great. Hers, using the same ingredients will turn out great.
Sometimes it is not a matter of changing the ingredients, but changing the cook so that the ingredients can be used to their fullest potential (and who knows, sometimes those ingredients when used properly, turn out to be something you'd find at a 3* restaurant).
Just because we don't have a second all-star doesn't necessarily mean we don't have the potential for a second all-star. Perhaps they just are being used properly to reveal their true potential.
Many have talked in the past about how CJ, if he had his own team, could/would likely be an all-star. Does that mean he would? No. But it means that people see that capability in him. Just because he isn't doesn't mean he can't.
Change the cook first, then tweak the ingredients as needed/able.
Gramps...