FEMU 1.0.3 has a revised RF layout and ground plane, along with more copper pour for the LDO footprint. I've also managed to break out both DAC pins. Currently testing the LDO at max throttle via the 2-layer prototype (larger, but same components).
I've also figured out how to use ftdi_eeprom to adjust the behavior of the DTR and RST pins, and finally got the FT232XQ-R working nicely.
If you're interested in making FEMU happens, buy me a coffee? ko-fi.com/femtoduino