Patch 5.4 already? When they said patches would be coming more frequently they were not kidding - we've only been in patch 5.3 for a month or so and patch 5.4 is already on the PTR. And it is packed with new features, some of which we've been waiting for all expansion, like the long discussed proving grounds.
While we still don't know quite a lot (like what form these will take, whether they'll be in their own location like Brawler's Guild or queued for like scenarios) we do know they're currently planned for 5.4, they'll allow for DPS, tanks or healers to face solo challenges to improve in their chosen role and they'll have multiple difficulty levels. This has been a feature long anticipated and requested, so I for one can't wait to see how it is implemented.