It's really quite bad imo, but it's surprising considering how the consoles are basically the same, hardware-wise - the Xbox on paper might even be technically more powerful.
I think that if they'd been able to get out there with a couple of great 1st party games early in the generation it might have helped swing the market in their direction but they didn't and now it doesn't matter.
Diagrams. Loads and loads of diagrams. One for each use-case.
Then I'd have one diagram to draw out dependencies between each service at the broadest level. Although depending on how messy your architecture is it can be very difficult to read, in my experience.