[Mark McLeod]

It's a little unique to the individual events as to when the lists get cleared.
Many are cleared already.

If you have an event in mind I can give you what happened for registration last year.

I think the Regional Director, et. al. draw up a recommended list of teams to pull off the waitlist and submit it to FIRST HQ who has the final say and may revise the order based on criteria the RD may not be aware of.
Different RD's may have different priorities, but your suggested list, if not the absolute order, seems reasonable. I'd add regional diversity as another possible criteria.