Idk,
I'm willing to say that Harden may have hit a bit of a wall at the end of the year last year due to his ridiculous workload. Just having a guy that can do everything Beverly already does while also being able to be the guy and let Harden rest will improve their post season EV by a decent margin, imo. Also it looks like Morey is probably looking at this as his two stars, so now he can lure potential 3 and d fa's with the MLE etc. They won't be contending in 3+ years anyway as others said so why not try and capitalize on Harden now and be a GS injury away from the Finals.
Not a huge fan of CP3 though so if he fails,