Being able to see a list of empires and the player would be neat.
Hm, would it show a list of empires online, or just empires in general?
How about a command which makes your empire do something.
Example: *Nicepoint's empire builds more units*
You could technically already do that with the current system. Something like "The Government decides to train more units".
Make a currency/ materials system
I've considered this, and also asked others, and it seems like it's a firm 'no' for the idea. It adds another thing to manage and can get kinda irritating to use. However, if enough people want it, I may make a separate add-on for it.
I enabled it in add-ons but will not work on server. Is there a list of conflicting add-ons?
If you have the other commands pack by TheBlackParrot enabled, it does some weird stuff and the add-on may not work. Try checking that. I'll also update the OP saying that.