It is the shy kids who are easy to forget. They can be ushered into the corner by the teacher/director or the other actors/students and overlooked because they generally won't complain. They will accept the status quo because they won't want to rock the boat. Their creative skills enable them to show acceptance and contrition when faced with missing out on opportunities.
Oracy is much more that just speaking fluently. It is confidence in front of people (be they large groups or small). It is eloquently articulating points of view without resorting to vulgar language or insults. It is the skill of bring people together. It is an art that can be a vehicle of cultural change.