Honestly, the way I've always interpreted OW and AOW was as a single process, with a break for convenience (
to allow each section to be done on a 1-=week vacation etc...). The OW was 'streamlined' for the sake of making it quick, cheap, easy and effective for getting people in the water and diving as efficiently as possible. However, with only 4 dives minimum, that course no longer delivered the sort of experience building and variety of diving that makes an ideal outcome for a novice diver. Hence, the AOW course was created to fill that experience-building vacuum, and allow the process to happen under safe supervision and with a little direction on skills refinement (
no new 'real' skills are added on AOW...).
On that basis, there's little or no point delaying taking the AOW course. If you do, you will find that your own experience aquisition will eventually supersede what could be gained from AOW training. That's probably why so many experienced OW divers personally don't see the need for it.
That said... the individual instructor makes a huge difference in outcome. A motivated, 'end-in-mind' instructor can use the AOW syllabus as a means to significantly refine and develop the trainee divers' skillset. Five training dives with a truly expert instructor, who is willing to mentor and flexible to adapt their training to your individual strengths and weaknesses... can be of enormous benefit.
Read my article:
Are Some Scuba Courses are more Equal than Others?
I've run AOW courses that provided a focus on 'fundamentals' development; others which prepared divers for later wreck training, others as a foundation for subsequent technical training, some to develop good photography skills. All were focused to the individual diver's goals, strengths and weaknesses. All were challenging, regardless of the student's prior experience.... Read details of my AOW philosophy
HERE
Avoid, however, those lazy muppet instructors who would just take you through a bare-minimum 'tick-list' of threadbare AOW performance requirements; allowing no supplementation or individualization of the scope of training; and basically do nothing more than over-charge you for 5 spurious 'fun' dives and a valueless plastic card.
The value in taking a course is ONLY from the quality of training you receive upon it, not the plastic you get handed at the end.