Nope.
Primarily since I don't feel like being interrupted in my questing and general exploration, and secondly since I don't care overly for PvP.
It can be fun at times but for the most part I'll pass.
So if I'm gonna use War Mode at any point, it'd be once I've done what I care about and my outdoor experience is mostly world quests, or on alts to see how it goes once we can fly around for an easier getaway to reduce the level of inconvenience.