You can enable authentication on the processor, and have multiple usernames/passwords, that are required for login over SSH.
The real benefit to me is bringing Crestron in line with pretty much every other network device out there.? SSH is very well established/respected in the networking world, and if you have to tell network security people what you're doing, is much easier.? If you just say "We manage it with SSH", they leave you alone, vs saying "there is the proprietary program called toolbox, and it connects over this obscure port".