Here is part of the blue post, well most of it, but all in all it was a short post anyway.
The clash between the factions has also never been so hotly contested: Battleground brackets now match up teams more evenly. The new brackets span five levels each, except the final bracket composed of level 85 players:
10-14 30-34 50-54 70-74
15-19 35-39 55-59 75-79
20-24 40-44 60-64 80-84
25-29 45-49 65-69 85
Fighters can also join the battle in Arathi Basin, Eye of the Storm, and Alterac Valley at an earlier level than ever before:
Level 10 – Arathi Basin and Warsong Gulch
Level 35 – Eye of the Storm
Level 45 – Alterac Valley
Level 65 – Strand of the Ancients
Level 75 – Isle of Conquest
Level 85 – Battle for Gilneas and Twin Peaks
This has been a long time coming. With the new enhancements coming with cross battle-group queuing the more focused brackets should not have super long wait times. Also this breaks the old X9 twinking to a certain extend because there are now more brackets with which to focus and stop XP.
I want to say I have posted an idea like this somewhere before but I can’t find reference to it, so it must have been in one of my various complaining rants to a random player about how the PvP system works now. Also I think when I was fuming about it I was thinking about a more complicated system that would eliminate the ability to twink by making dynamic brackets and grouping people in queue with others +/- (2-3) levels of one another. But that would be rough to implement.
All in all this looks like a really really good change to the leveling via PvP option, for when you get sick of all of the current content.