@Harvy66:
FreeBSD 11, summer next year, will have a slew of huge improvements for nearly everything related to VMs and network performance. Then it's a matter of waiting for PFSense to get rebased.
You seemingly have no idea how trivial it is to 'rebase' now.
What was true in the past is no longer true with the changes we've made to the build system for 2.3 and beyond.
In other words: We fixed that shit.
Point-in-fact, 2.3 follows -STABLE. When it is released, we will be so far along the path to 10.3 that the eventual upgrade will be a non-event (and likely carried out entirely via "pkg update;pkg upgrade", or the GUI equivalent.)
We have an internal project that follows -CURRENT (FreeBSD will be the eventual -RELEASE of what is now -CURRENT), so that will also be trivial.
Mostly, it will come down to testing.