An amazing amount of thought went into this.
I find that my little brain starts to hurt when I see diagrams like this.
The information is good, but the work at decoding it is often greater than the reward. I think I’m going to follow your lead and go with A3.
Looking through it though, the devil appears to be in the detail. Product Management and Architecture Committees seem like a blast from the past. This might work in a specific application. The metaphor is also a nice bit of nostalgia.