The Walking Dead Mode, a twist on Factions because everyone loves Zombies now.
Everyone and their mother loves The Walking Dead for whatever reason. Factions is an old game mode blah blah blah but we can make it "new" and refreshed by marketing it as a "Walking Dead" style game mode. Rules would be simple, have a good amount of zombies out night and day and have them kill in 1 hit unless you have armor on (3 hit kill or so). Just like factions and the show, small bands of players would go raiding and attacking other groups for supplies.
I see that Fuzzlr is openly against Factions and I can understand why he may feel that way but please hear me out.... I think resources are not being allocated in the right places and factions just makes sense at this time. We currently have the UHS server and there are usually 1-3 players online and anyone saying factions would yield less is being ignorant. Besides, I don't know of a server that has a Zombie Apocalypse mode. I know we have tried factions in the past and it has had a decent amount of player involvement and I think it is a good opportunity for some potential donations, example: $25 for a spawner (very OP in factions especially if you are killed in 1 shot by a zombie). So, let me go on....
Factions is very familiar to people that play Minecraft, we know how it works, its simple and easy. Not much work is done moderating factions when all griefing is allowed and its pretty much a free for all. The easiest way to approach factions is the "there is no rules approach" thus giving a lighter load to those who moderate the server and yes I know from experience it could be a pain. I don't understand the notion of "toxic" players coming from factions because many veteran players like myself can play factions in a civil manner.
Once again, I'm not just saying "Factions" because Factions but it would be a better allocation of resources when compared to UHS.
EDIT:
Saw Telinus' post, don't think it would be too hard to incorporate guns like Halo on this type of factions server.
Also, the spawner idea at $25, that would be for a base spawner of say a zombie mob that someone could make a farm of..... I could see it ranging to $50 for a creeper spawner for gunpowder to make TnT. For those who think it won't be purchased think again, people will pay $50 for such an advantage or pay with in game meebles on the regular server to donate for such perks.