This makes sense to me. Ty for taking the time to explain it. However, you can't be a one man band. It won't work in the long term. You'll burn yourself out as I'm sure you're probably already doing. But you already know this and I hope you guys can figure something out. Spleef is better with more people. I think people would want to come and play but it's hard to get people organized. The only reason I even know about Mob Arena is bc I saw the message one day. It doesn't have to be a "Staff Sponsored" event. I think a message saying "hey, you should come on here" would be what is needed the same as for Mob Arena. I know that part would require almost no effort. As far as the spleef arena itself what would make sense is to set it up so that when a player falls to the ground the spleef floor is automatically reset. When I went to /fun today to check it out and the floor was almost completely gone. Another change that should be made is that dirt is by far not the best choice.
I helped code the now debunk Delta Team server, if you ever need a helping hand you can always ask. I would not do anything large scale, but I can do minor coding and setting up mods on the server.