Braswell N3150 install success
For those interested:
Brought one of the those aluminum Braswell N3150 dual-NIC/antennae nettops from AliExpress. pfSense 2.3.2 installed fine. Spent hours trying to get the LAN and WiFi to work in bridge mode to no avail. So I just said F'it and created a subnet for the WiFi and added an any-to-any firewall rule for the WiFi subnet.
Performance is good at 25Mbps broadband speed, so your YMMV at higher speeds. I'm just glad I got rid of the SOHO router I was running.