@jmbraben Restore reinstalls all packages which would pull the files from the latest 2.7.x as I recall. Starting in 2.7.2 one has to manually change the update branch to move to the next version do it is safer now.
The problem is, let’s say the current version has a later PHP and a package is dependent on PHP, it will install the later version which may not work with 2.7.0 code. Or similar with various libraries.
.1 fixed several security flaws: https://docs.netgate.com/pfsense/en/latest/releases/2-7-1.html#security