One thing I find interesting is what fan-inspired "conventional wisdom" would be, about what pro atheletes should and shouldn't do, if true free agency had been the rule in major pro sports from the early days. I suspect we'd have seen a lot more players choose to play with other stars they like, in baseball, basketball and football. It's not terribly meaningful to say that, "Magic Johnson would never have done this," or "Oscar Robertson would never have done this," since they didn't have the control that players like LeBron James and Kevin Durant have, so we have no idea what they would or wouldn't have done (and Magic wouldn't have mostly because he was on a great team pretty much from the start, but that's neither here nor there).
For example, in an alternate universe where the Bulls never quite get over the hump and the current incarnation of free agency existed in the 1990s, I could very easily see Michael Jordan and Charles Barkley choosing to get together on the same team. Neither would have considered it "ball-less desire to take the easy way out" and more "taking control of their own destinies because they could."