I honestly don't think this is going to fix the que times or the shortage but it might just slow down the "why do tanks get extra" feeling that was sweeping the Internet.
I do again applaud Blizz for trying to do something with LFD and the backlash I'm sure they felt.
Originally Posted by Blizzard (Source)
We’ve been following discussions and reading feedback on the Dungeon Finder Call to Arms feature, and appreciate everyone’s opinions on the topic. We wanted to share a few items though that supplement the recent announcement:
The additional reward for completing the Dungeon Finder Call to Arms (called the Satchel of Exotic Mysteries) will be Bind on Account; able to be freely sent to other characters on your account once you receive it.
An error existed in the announcement regarding flasks and potions being picked based on your spec. This is not the case. If someone earns a Satchel of Exotic Mysteries, and if it rolls the random chance to provide a potion or flask, it will be a randomly selected. This helps ensure a broad array of available flasks and potions for all characters.
We also wanted to clarify, mounts that have a possibility to be found in a Satchel of Exotic Mysteries are found with the same rarity as if you had slain the dungeon boss that normally drops them.