Maybe it's because I'm fan and not a coach, but i'd rather have players that get 75% out of their 95 level talent than a player that gets 100% of their 60 level talent. Obviously player B is less frustrating and is a better story, but player just has a bigger impact. It's not "fair," and isn't a good story, but oh well, some people are just better.
Edit: this of course is assuming the player in question is being paid appropriately. If a player is locked into being overpaid based on potential, then it obviously changes the equation. But a guy like Blatche is only on the books for 3-4 million this year and next, it's not like he's a Dalembert case.