I find the notion that Simmons didn't improve at all to be strange. He scored more with a better efficiency all while lowering his usage. He rebounded better. He turned it over less frequently. His passing dropped a bit, but that should be expected with a ball handler like Butler joining the team. His defensive stats were slightly lower, but again he had someone like Butler next to him taking some defensive pressure off. He even improved his foul shooting (and got to the line much more frequently). Sure he still won't shoot a 3 pointer, but he improved many aspects of his game.