The downside is that War Mode will make you vulnerable to other players, which means you might be killed more often. Whether it’s worthwhile will depend on the zones you’re visiting and how active the other faction is on your server cluster. Heavily populated realms usually mean more players on both sides, and more conflict, but on quieter realms, you may rarely run across an enemy.
Power leveling is the term used to describe the process of leveling a character as rapidly as possible with the least amount of play time. It can be used from any level up to level cap. Contrary to what many believe, efficient power leveling does not require endless hours of grinding. The best methods of power leveling involve doing many quests in an orderly fashion.
Obtain your heirloom rings. Ghost Pirate Rings can be obtained via Shipyard missions. You can equip one ring from this category. A Dread Pirate Ring can be obtained via placing at least second in the weekly Stranglethorn Fishing Extravaganza, which on many realms is a very competitive event. Note that to obtain the Ghost Pirate Rings, you will need a max level character with a garrison of at least level 3. You you will also have to develop your Shipyard to the appropriate level to receive the mission. Your other heirloom gear will still give you a big boost if you choose not to go for these.
We have no idea what implications this might have and whether or not it even indicates anything, since Patch 8.2 is still in testing and a Tuesday launch is more than unlikely due to Essence tuning and Azshara's Eternal Palace, which is supposedly coming shortly after launch. Blizzard said they wouldn't be delaying the new raid like they did with Battle of Dazar'alor.