first notice, disabling SSHD is kind of weird, but ok, you want everybody to setup it through some kind of viewing device like TV and there is nothing easier than to enable it using rc-update, but the things I found out in default configuration are kind of „lame":
PasswordAuthentification no
PermitRootLogin prohibit-password
This is „super secure“, but when you boot it and want to setup it without connecting to TV is kind of… Weird again.
Now I will try to update outdated packages, we will see if I won’t get „M3 Brick“ again.