Okay, stick with me on this: "tied in to" is not the same thing as "similar concept."

Throne of the 4 Winds is a similar concept to Gruul's Lair, in that they're both raids and both have 2 boss encounters, but that doesn't mean they're "tied in to" one another.

As to the rest of your comment, essentially your complaint is that instead of devoting 30% or 50% or whatever amount of developer time to the things you care about, you feel that Blizzard should be devoting 100% to things that specifically interest you.

Well, when you start paying the $15 a month for the other 10,999,999 of us, feel free to demand that. Until then, I'm afraid you have to accept that a business that has many customers with many different interests might occasionally spend time on things you don't care about. That's what we call "appealing to a wide audience" and you have to accept that. Accepting that you're not the center of the universe, and that by and large, no one cares what you as an individual wants is what we call "not being a 3 year old."