I started on this tonight, and I hope to have a version out to test tomarrow.
It's a little gui which you can bring up from anywhere ingame, (button on the main menu + ingame keybind) that shows you tons of information about a server. Additionally you can login with a password (like an admin password) to access certain features, such as the ability to warn, kick, kill, clear the bricks of, or ban players.

The main gui.
I'll post more pictures with the gen admin tab and other tabs for that section once I add them.
The message box at the bottom has 5 differnet options, or tabs.
Admin, which is admin actions. Shows actions such as bans, kicks, and other admin things and who did them.
Events, such as minigame resets, joining and leaving players, and deaths.
Chats, exactly what it says.
Status, which shows things such as connection attempts, server feedback, weather you got the password right, and so on.

The petite server select gui, just click a server to paste it's IP in.
The way this works is that it is a "system" addon with both a client and server side.
You'd basically put this in your server's add-on folder, and also put a copy in your client at home.
The assumption is that if you can host, you can port forward one more port, but if you can't I'll also be working on an option with a centrally hosted server you can use, provided you don't mind all your admin actions going though me first.
Obviously this is meant for serious dedicated servers where it can be difficult or time consuming to get to the console, but it could save time even if you were just hosting from home.