Worth releasing? Absolutely.
Will many use it? Probably not. However, that doesn't necessarily mean that someone wouldn't find it usefuil to use, and or learn from.
I still think you should consider multiserver admin...a synchronization of ban lists between servers, and ability for those admins on one server to see the chat/request of players on another to admin it, if they're on that server's admin list.
Again, this would be a niche market, but I've seen several hosts lately that have more than one server.
I'm pretty sure my friend and I would use it. We attempt to share ban lists, even though I haven't run a server much lately.
Oh, mod/lua script comparisons too. He is always tinkering, and every time I think I might have matched his server script/mod toys, he's gotten some new one.
Anyway, possible pipe dream for later.