So you rushed through all the content, as quickly as you could, and are currently upset that they have not provided new content months before their regularly scheduled content release?

This is one of the few games, until this most recent WoW expansion, that you can rely on a 3-month update schedule. They have kept to this since the release of ARR and have always been consistent. Also, prior to the release of SB, they laid out that new content would be released in even numbered patches (4.2, 4.4 etc.) while the odd numbered patches would be mostly balance updates.

They told ALL of us that there would be a gap in content right now. They planned that gap. There is a reason for that gap. Your preferred play style of rushing as quickly as possible to clear everything is absolutely not what they are designing content around. I'm sorry to say that your problem is on your end alone. SE doesn't need to change a thing.