I love OPNsense --converted from pfSense about 4 weeks ago.
The only odd thing I encountered was my Zoom modem loaning the WAN interface a 192.168.100.10 address in lieu of the public address I was used to seeing when using pfSense. A little closer look at the OPNsense WAN interface "DHCP client configuration" I found the handy-dandy "Reject Leases From" --- used 192.168.100.1 and I'm Golden now.
I find aliases extremely useful and would like to see more use throughout OPNsense, such as the "Reject Leases From" I mentioned in my little story above. While the hard coded address works perfect I'd be even MORE happy if I could use an alias ---
The more I can use aliases, everywhere, the better. This lets me have a really central place for as much IP configuration as I can get away with in one place.
Please expand use of aliases ......... if it happens great ... if it doesn't happen, great, I'll still be happy using a kick-butt product anyway!!