I've never understood why people want extra special positions on their servers that mock admin status. It does not benefit the server at all and is literally a pointless extra datablock to make other "special" users feel above the rest of the crowd. If you are going to give out special positions on your server think about this: Do I trust this person enough to give them admin? If the answer is no, then they should not be given any other special things (ie mod or VIP). A good administrator does not need a "Test" in order to prove themselves a worthy admin, their actions as a regular user should more then demonstrate their abilities to act in the correct manner to administrate a server. This is just another way for hosts to put their friends above other people who might like the server just as much as them.
I think a mod like this would be useful if you have friends who are irresponsible. So like, I have friends that I have known for years, and I would trust with admin. But then I have another group of other friends who basically just like to richard around and screw things up. They're entertaining and fun to hang out with, but I would by no means want them to have any extra power on my server. But they're still special, and I'd like them to feel that way, so- VIP. It literally means "Very Important Person".
Super Admin is for the guy who helped you set up the server and knows just as much or more than you.
Admin is for the people you trust to keep things running smoothly.
Moderator is for the people you don't trust yet, but who expressed an interest in helping things run smoothly.
VIP is for the people who you think are important, but you wouldn't trust them to bring you a can of soda without shaking it up first.
A VIP mod just adds an extra level of recognition.
If you wanted to add extra levels of power, I highly suggest the permissions mod. The last time I checked the ui was still kind of clunky, but other than that it works perfectly.