I can actually confirm this for you since I'm a card-carrying focus group member. The below list of top priorities is entirely accurate based on what I've been hearing as part of this group and in conversation with many current and ex-WAR fanatics.
- Addressing concerns related to Crowd Control and Area of Effect abilities.
- Continuing to improve client and server stability and performance.
- Strengthening and improving the Tier 4 experience.
- Improving server population distribution – both in terms of overall population and realm balance.
- Improving itemization and the overall distribution of "carrots" (rewards) throughout the game.