Surprised no one is talking about this.
The new chromie time phases you to avoid level 50+.
Making a level 49 and twinking it with the legion artifact and maybe some crafted gear could become a big thing.
You would probably need to do this as alliance as more horde use warmode but i reckon it would be very simple to get to a position where you are literally invincible vs 99.9 % of players.
With the abundance of horde players to gank and zero repercussion from level 50+ characters i think this could be a fun pvp niche.