Im not worried about Lebron going to LA. He's no spring chicken, has played 15 years already and has seen his better days. Though he's still dominant the fact that he'll be 34 next year, has logged about the most minutes during the past 15 years says a lot about how he's going to age. He's also a big boy and that could work against him, unless he's got some serious "recovery" medicine.
We're in good position to take over the Eastern Conference, whether Lebron stays or goes.
I'm more worried about staying healthy, picking up a good shooter and keeping this team mostly intact for the next few years.