The question I have is when you have, let's say, a PR1 like person (not a PR1 anymore) who also has, let's say, an AZ NOS (the article says they can for career flexibility), who gets to decide what NOS they're going to use for the purpose of detailing? A squadron is still going to need to have X number of PR-like and AZ-like people onboard. In this case, would one person count for both billets?
A valid concern, but on the Reserve side, this can already happen (theoretically) and it's taken care of by "the system" and its codes. The 15 different emails I got today (and the NAVADMIN) mention that the PERS system is also changing with the policy change, so I'm thinking this won't be quite as much of an issue as it could be in your scenario. I'm sure the PERS system will be online in FY20. So we're good. What could go wrong?