For the next board revision I'll have to remember to put a cap between reset and ground. Reset has a weak internal pullup resistor, so I can at least omit that I think.

One other detail that's annoying me is that the silk screen is of course broken on top of any holes. I'll try to move any text away from them to keep it readable.

The SWD signal names are covered by those small connector housings, so moving them a bit further inwards might be a good idea.