I would prefer to just have some sort of objectives system with definable objectives. Where a CTF style objective is an option as is a "reverse CTF."
If I was any good an LUA I would look into it myself. Not to hijack the thread (but I am) what sort of objectives could you guys think of?
A bit of history for you guys, back in '07 before the move to cryengine we were looking at modding Enemy Territory:Quake Wars instead, which uses three different objective based goals -
Destroy, Hack, and one other one I can't remember. There was a lot of gameplay potential that sadly isn't the easiest thing to implement on CryEngine. Its too bad that many flowgraphs don't work in MP otherwise it wouldn't be that difficult at all.