This is even an issue? I'm sorry, without TNT the war world is just a big arena. It won't be any different from the normal server except for being allowed to stab people.
Hunter maybe we could make a attack and defend type area in WW? protect the region so tnt cant be used(pretty sure its possible, just flag tnt). But still keep tnt in war world otherwise. Also I still think there is an isue in WW with people flying and finding bases then walking to them. Or also tping...