Air Marshall Stu Peach, DIS and ex OC IX Sqn might have something to say about the lack of 2* Navs. I think that you will find that it will be another few decades until the first starred WSO comes along IMO.
3P
I was on the staff at Nav school when the 2*'s son was binned; his brother is also now a 1*! Obviously something runs in the family.