But even without prominent GS, why can't proficient have sublevels? If we assume that levels are integers, i.e. strong is from 8 to 9, proficient from 9 to 10, etc..., I think there are still sublevels. The maximum cannot be 9, because then it would be very rare to have a player with proficient GS. So if the maximum is 9.99, there is still a range there for sublevels, no? Please correct me if I'm wrong, I'm just speculating