Raise your hand if you're surprised Danny Ainge drafted a combo guard... All of you with your hands raised are liars.
When people say combo guard, they often mean a shooting guard brain in a point guard body, a player without a real position. Moore seems more like a legitimate shooting guard, maybe smaller than ideal at 6'4" (the same height as Dwayne Wade), but a plausible shooting guard size nonetheless.
I tend to see Moore as a shooting guard who could fit into a system as a three-and-D role player, but who has the versatility to possibly take back-up point guard minutes. That's very different sort of creature from the 6'1" or 6'2" Allen Iverson wannabe who you often see drafted and plugged into some sort of combo guard role.
We should probably be prepared for some Gary Neal comparisons when people start talking about how Moore might make an impact.