Guys, just an update.
I've assembled K16s v1.0. As a precaution, I've measured conductivity between powerrails and grounds as usuall, but unfortunatelly, 3.3V reg burned out anyways

.
It was working for a while, so solder bridge probably caused that (it happened to me before).
I've replaced it, but now the 3.3V rail is shorted to the ground somewhere, so I'm debugging that now.
I've tripple checked the schematics and the datasheets today, and it's 100% correct, so this is really just an issue with solder bridges.
I just hope that the short is not beacuse of burned out ASIC, beacuse replacing those it's pain in the a**.
As soon as I'll have something new, I'll post it ASAP.