using redhat 7.2

Is it possible to not allow root to ssh into the server remotely, but allow the account that ssh'd in to the box to su to root? This way there is the added security of a hacker needing two passwords to hack your computer, a username/password for a regular account and also the root pass.

If so, is it really worth it, or am I wasting my time?

The short answer... YES.

You can simply not set up any "keys" in root's account.
If you can only log into the machine via ssh, only those
authorized users will have ssh capability (as themselves)
and can then "su" to root. Of course, if you have root access,
you can do anything you want including creating a ".ssh"
directory and place your own key into "authorized_keys"
thereby allowing ssh directly to root so you have to
set some policies up to make sure those with root access
do not violate them.

Just add "PermitRootLogin no" to your sshd_config file.

thanks guys