Patch 5.4 will be dropping in two weeks, and that means that the battle in the Barrens will be going away, forever. All of your Radical Mojos will need to before the patch drops, or else they'll become worthless. There are a couple things that are sticking around, but they're the exception (the pet, 24-slot bag, and Brawler's Guild item).
Gear wise everything will be going away as well. Blizzard has made it clear that there are no plans to reintroduce the gear right now, for cosmetic reasons or otherwise, and I'd take them at their word. People have speculated, including myself, that it'd not be out of the picture for them to be introduced as Darkmoon Faire items at some point, but if Blizzard agrees with that, they're not letting on. Either way, as of this writing you have two more chances to get the gear you want -- so double time it over to the Barrens for your grinding!
Crithto made a post on the forums concerning exactly what's happening, and you can read his full blue post after the break.
Every item other than the pet, the Brawler's Guild item, and the 24-slot bag are being removed; this includes the removal of the ability to earn the title and the Darkspear Rebellion Quartermaster. We know a lot of you would like to have the cosmetic goodies readily available to pick up with other characters or to share with your alts, but this event was designed to be part of the story for the game at this point in time. For those who earned their title, you now carry a badge of honor for having helped the war effort against Garrosh.
The weekly quest was designed as both--and most importantly--an event that leads up to Patch 5.4 and the Siege of Orgrimmar, and an opportunity for level 90 characters to work on getting gear a bit quicker in preparation for the new content. Now that the story of this expansion will be pressing forward with the patch, it will be time to wrap up some of the activity in Durotar and Northern Barrens. Think of the action in those areas as exclusive for where we are at this point in the game (not unlike the gathering quests for Ahn'Qiraj and the Scourge Event before Wrath of the Lich King).
Please know that I completely understand how you guys are feeling about this and have several alts I've been working on, too. But let's not forget that the Radical Mojo clearly displays "Binds when picked up". Simply switching it to BoA would be nice for those who have more than one unused, but it would be unfair to everyone else who did not stockpile a BoP item.
For those seeking opportunities to provide your alts with gear, the Timeless Isle will be your new favorite place to visit. The tokens you can find there are BoA before being used, and can be passed to any of your alts to generate an item for his/her spec. The gear you create will be item-level 496, and as you progress through the Isle, you will also have the chance to upgrade them to item-level 535.
Lastly, while Ravika has other important duties to attend to once 5.4 goes live, we know that Griftah's Authentic Troll Shoes hold a soft spot in many hearts, so we're currently exploring options to reintroduce them at a later date.