"flashes of brilliance, but also can be inconsistent with decision making"... that sounds like Geno!
Geno was a 2 guard to me playing the 1.
Grace seems like a true 1.
That's a good way of looking at Geno's game - though he did have some court vision. Really, he didn't have a position, not in the Big East, anyway.
I'd love to see St. John's bring in two different-styled point guards in this class, and maybe an undersized shooting guard. Change of pace guys - one bruiser, one speedster.