Comment # 1 on bug 1119511 from Richard Brown

It is possible to now copy your ssh key during the installation - the root
password prompt now has an Import Public Key section

Therefore the new openssh default of not allowing root authentication with a
password isn't quite so bad..lowering the severity accordingly

Possible Solutions

1: Change ssh config to allow root password auth - I do not like this idea
2. Change the installer to create a user during installation - I'm indifferent
3. Accept the current behaviour - I prefer this