Im not worried, the population of any game goes up and down when content is new and when they are waiting for the next content. The doom and gloom of this expansion is getting quite ridiculous honestly, some of the doom posts sound like the game will shut down forever tomorrow. Yes, the expansion didn't hit the mark for expectations for some, some were neutral and some were positive. CB3 has delivered a lot of good story and content over the years, I sort of expected one expansion won't hit the mark after a good streak of great content.

It is the first post-patch content as of now and we are in a bit of a lull so yeah, the population will be lower, but when 7.2 drops a spike of the population will happen, then decrease, then 7.25 drops another spike will happen again, then it is rinse and repeat.

So yeah, it seems normal to me.