The in game map should have coordinate. the PvP Cyrodiil which isn't a zerg mode is useless without this.

agree 100%

just bumping this.. every game that I know of with PvP aspects like this has coordinate. Even single player games. It would be weird when I'm describing the place I am located at even possibly making my friends/guildmates lose direction.

I agree!

south east north west of that tower/farm?

Though Coordinates are helpful. If you are in a group you can see the place your mates are at. Was there not a squad marker the leader could set on the map?