One master GM and for each faction a smaller GM :p

A lot of PVP = true. Ppl not willing to play pvp battles should therefore stay away.
pvp battles will have to be decided in multiplayer.

IC can be solved in numerous ways.
perhaps a general subform for 'world IC' where each faction can have an embassy among other things for example.

You will have to IC both national and international :p


But agreed on the amount of work. I was just spitting the idea :)