While I don't like the blandness of doing 2 dungeons for months on end only to get gear that will become obsolete in ~3 months...

... as long as the game is built around the raiding scene, and raiders need an easy way to gear up replacements / substitutes, this is just the way things are going to be.

The oft-brought up "horizontal progression" simply provides an illusion of choice (since there is only one best path that will be enforced by the community) or more work to do (which will annoy raiders (see the MSQ requiring completion to unlock the endgame and new Dungeons / Trials not being tied to it any longer as a result) and frustrate / turn away casual players).

There is no perfect solution, and I agree, vertical progression gets dull. That said, have you an alternative to offer?