A lot of these has been already addressed by a security menu in the FreeBSD installer, since settings and/or mitigations for mentioned issues have been possible

A lot of these has been already addressed by a security menu in the FreeBSD installer, since settings and/or mitigations for mentioned issues have been possible in FreeBSD but have not been enabled by default due to POLA (project's rule of Priciple Of Least Astonishment) in order to prevent users expecting some behaviour to be surprised by changes. Those who knew about these could always enable those, and those who didn't now have option to do it via the default installer.