Never cared much for Harden's game, and I actually think Harden can be a negative on a team. Rule changes are taking away a lot of his ability to get to the free throw line too (lean in on a 3).
On a team like the Nets, I actually think Simmons is a better fit as they already have two alpha type scorers and could use the D. Simmons having not played may be more of a challenge there.
Bucks are still the best in the East.