- Very few people plays an alt actively because of the horrible gearing proces.
- A lot of players quit pvping before 5.1 because of the horrible balance (warrior/bm hunter/frost bomb) as well as the mmr bug basically ruining ladders.
- Players not returning to the game after 5.1 because of the gear imbalances and no possibility of ever getting gear equalized for rank competetion (because of the extremely long gearing proces).
Gearing has played a huge role in arena activity. That alone could fix plenty of issues. 5.0 balance was pretty fucked as well. Guess we will never ever see a return of Tbc/Wotlk arena activity.