Pretty sure it was Eddie Johnson who talked about it last night that Grayson Allen has learned to play off of KD really well and being the closest Sun to him means his defender will be the one to double on KD leaving him open and the easiest pass out of the double as well. That's the best way for Allen to play and he'll get so many touches that way that he'll be feasting.
I feel comfortable saying we would be in a worse spot right now if we didn't have Allen. He's been huge for us without Booker and Beal. I wish he were a better passer, not that he's unwilling, but he's been a great complimentary player so far.
He's the 5th starter when the big 3 are healthy and has earned that role. I know that was an often discussed topic that could go many different ways but he's shown he's a notch above everyone else in the rotation.