I agree that 3 hours is excessive at this point in the game's life. Uncontested it takes 15-20 minutes to kill but contested, it is (for example) an hour or 90 min of pvp but then turns into a waiting game to see who gets bored and leaves first. That's not exactly compelling gameplay 3 times a week, for drops and gold that are no longer nearly as game-changing as they were even a year ago. That said, I feel like 1 hour maybe isn't long enough because of how easily it can be reset. If the goal is to increase participation from multiple factions while making the boss killable but also still challenging, perhaps a compromise of 2 hours would be a better place to start