Hmmmmmm, Let me see Oh yes I think that OW cert should be POW pool open water first half of the people I certified with had a hard problem with the RDP cards and I think these days computer's are subject to possible failure so if you cannot read the cards you should never pass OW cert. Then comes buoyancy , this is a major part of become a good diver . After you master buoyancy then comes navigation the next major task in becoming a good competent diver and dive buddy . So if you have enough dives to master or come close to mastering these skills , AOW should be rescue and nitrox, only because half the people I see cannot navigate or even come close to buoyancy skills. So after all the first skills you should have enough dives to be called advanced.
these are my opinions but who knows all the dive shops would close due to no money.