Sounds Awesome.
But to make it a little more original, we would have to add some stuff to it, like clans, gangs, bots that is aggresive, guards that try to kill you if they see you kill someone/a bot, new items, you get what i mean.
I have never seen or played AC on multiplayer, so some stuff i just said is probably there, but i would join a server with a mod like this.