The parts are here and testing has begun! Unfortunately I made a mistake and it took me a few hours to figure out why my part was not responding: I didn't connect VIO to power - so that's what you see with the little botch wire there.

Unfortunately I'm still having trouble with programming the EFM8, and I think that has something to do with my rework, even though it looks good to me. As far as I know, the EFM8 only requires power and debug to be connected in order for it to be programmed.