I don’t think so. You can have movement with vacancies of 0 as long as the net change is 0. I think of vacancies as where they want growth. Look at how many upgraded into OAK in the last award when the vacancy was 0. They backfilled those who left.

maybe I’m looking at it wrong but that’s how I’ve come to understand it

Edit: 8 FOs upgraded into OAK when the August vacancy showed 0.