T7 content is not exactly the most engaging content in terms of difficulty or scripting. Especially with 2 lockouts per week and nearly every guild having it on farm, burnout is already starting to occur.
Consider moving up Ulduar release date by one month.
As far as I know they also want to respect the PVP seasons and give people chances to farm their rating / PVP-gear / PVP-titles before moving to the next season.