He had a great season there. I thought he was on the verge of finally being a legitimate starter. Was it a fluke? System-related? Surrounding talent? He's had a couple weaker seasons since then.
I would assume it's system related. Iirc, the Suns played loose and wanted to run a high powered offense. I mean, didn't Dragic have a career year as well?
Green's current game seems to thrive on fast paced games (fwiw, I think he'd be great in GSW), which is why I think he'll do well here. I don't think he would've done well with the slower, grinder, KG/PP C's team.