I'd venture that
CyrHUD comes the closest to a battle overview standpoint. (Then again, I may be a bit biased about that addon.) The main difference is War Tools shows all the map info all the time whereas CyrHUD only shows actual battles. This was largely because I felt showing everything was too cluttered and makes it too easy to miss something under attack.
For the coordination standpoint, you really need everyone in the group running it (or something like it) for benefit. Most groups that're that coordinated run Teamspeak (or other voip) which far surpasses what any addon can do.