For what it is worth, I just upgraded from FreeBSD 11.1p11 to FreeBSD 11.2-RELEASE on a Vultr VM (VC2 tiny instance) following the instructions in the FreeBSD handbook without any issues. It is a pretty simple set-up just the Base OS, Apache 2.4 web server, CouchDB server, and a little game server running under mono. I installed all 3rd party software via the packages system (except the game server, because there isn't a package/port of it).