After adding some more ground vias, fixing problematic traces and vias and adding more pin labels, this is likely the revision which I send to OSHPark next week if there are no review comments.

CTS from the serial header is connected to the SYS_BOOT pin (for that the ⇨BOOT behind it on the silk) but on the sides (J1 and J2) all PINs of the NINA-W102 module are exposed and there the CTS label points to the actual UART_CTS pin.

After a design decision made on another project (https://hackaday.io/project/152901-iot-conference-badge), this board will have not just a life as breadboard prototyping breakout but will be used as a module with stackable shields on a conference badge. This gives the attendees the possibility to just detach that part from the header (not soldered) and use it for their projects.

This is a short draft from @Gonzalo Casas  of how this badge looks like from the dimensions, the thing on the top is a Waveshare 2.13" EPD module.