You sound like you have a well established multiplayer
Nothing that is complete, for now.
Tried RPG, bloody hell difficult, then I stopped. Then I tried my dream game to make, a CCG, which I learnt the importance of understanding the send message and how to fully exploit it. I would say send message is the core functionality in any mid-high scale game. I'm using it like 80% of my MP function in my CCG currently.
If I decide to go back to the RPG, I don't see myself having the same problem as before, except that it's better to start from scratch for that lol.
how do you know that the walls were arranged randomly on the map when you start the game?
Mind elaborate? I don't get the question.