Really, as far as the second pic of the recepts mounted in the sidecan of the panel are concerned, what's really wrong or even unsafe about it? Please cite specifics as I don't see an issue. And just because the Code doesn't specifically permit it doesn't make it wrong, just unconventional.

As long as total wire fill limits aren't exceeded, having such a setup isn't a violation IMHO.

Now the recpt in the deadfront of the Zinsco (or any panel) that I can clearly agree is not safe. There is the possibility of accidental contact with or grounding out of energized parts with that setup. Not to mention it's Zinsco.... [Linked Image]

Stupid should be painful.