Embiid may be on track to get to the second round of, say, the dh52 league. But that's assuming his D rating is phenomenal, and even then he may be comparable to Kemp's best season. Similar negatives, but lesser efg%.
And Lebron, yeah, he has been tearing it up stat-wise. I agree with copernicus that the D rating will probably keep this from being James' best season in the sim, but he's cemented himself as the cream of the cream in a progressive league - at least, among players not named Wilt.