When I right click a node Tools -> connect, it would be wonderful to be able to select RDP, Telnet or SSH. Additionally, using fancy reverse-ssh tunneling or stunnel or something (in my mind, easier with a linux based server), having it launch the sessions FROM the management server would make my ACLs smaller and more concise (only opening things for the management server and requiring all access through the server).
An alternative, "user-defined" option (maybe configurable from the server's control panel) could be used to launch scripts (where I could define the reverse tunnels or to launch PuTTY from my windows laptop).
If any of this is do-able from the console already and I haven't RTFM'd enough let me know. I haven't looked into NXSL at all and the I have used the manual to fill in gaps when something wasn't working as expected.