Looks cool and I can think of a few ways I'd use this. The pin labels on the back or ambiguous though--not obvious which label belongs to which pad.

Sad to hear and thank you for feedback!!!

Ive added the last photo. Please take a look, that's why labels are looking strange.

When someone solder a pin header he'll see only half of labels.

There is another way to remember:

Clockwise from six while bottom view -> PWR, D2->D13, A0->A7, GND. That's all. Should be quite simple.

(Answer why board is so overloaded with routes and vias. lol that's why).

Thank you.