Not sure why the 76ers would want to get rid of MCW, the kid had a good rookie year, and would be a good player to build around. It is possible that the first two picks off the board could be Parker and Wiggins, leaving the 76ers a choice between Embiid and Exum, but they could quite feasibly look to a player like Vonleh or make a deal to trade back with a team that would like the #3 pick in the draft. So personally I would keep hold of MCW, because from what I've seen, he should have a bright future in the league.
Now I can see why they might like a player like Exum. He's a big kid, athletic, and has the talent to be the next Russell Westbrook type player. But at the same time he has not really played at a high level of competitive basketball. So while there is no guarantee MCW will push on to become an elite PG, at the same time, there is a significant risk in shipping off a kid that has already made an impact in the NBA for a player that one could argue is a boom or bust player. At least with MCW they have a kid that should only get better from here on. After all, he is only one of three players to average 16-6-6 in his rookie season, and the other two are hall of fame members Magic Johnson and Oscar Robertson.
But if the rumor is true and the 76ers decide to move on from MCW, then I would be more than happy to see him become a King. If the deal is as simple as #8 for MCW, then that would give us a talented young PG to pair with our talented young SG, giving us a back court that the team can build around. Equally, if the deal is something like: #8 + McLemore for #10 + MCW, or #8 + McLemore for #32/39 + MCW - then that type of trade could be ideal as well because we would grab a talented young PG, and still have a draft pick or two. Personally, though, I am not convinced he will be traded. However, if he is on the block then I would rather go for him than the potential one year rental of Kevin Love, because at least MCW would give us three seasons of contractual play, and then we would be in a position to extend him if he became one of the next elite PGs.