Your concern is the crux of the issue with WoW (and honestly, broadly speaking the entire genre of video games) as a whole. In the past a player like you would have had plenty to stay engaged with. Over time, however, the game strayed from what you wanted out of it. Should the designers never change anything ever to appease players like you? Or should the designers forge a new direction, possibly alienating players like you but making the game more approachable for others?
Ghostcrawler had a blog post about this subject that I thought was pretty enlightening. The tl,dr is that they've found most people don't quit because of issues with the game (as you often read on forums), they quit because of the exact reason you mentioned -- the people they played with don't play any more and they're just bored of the game.
I generally agree with Greg's take here that it's better to err on the side of innovation; however, I'm firmly of the belief that the innovation needs to be in the direction of things which already work in the game. Player housing simply doesn't fit with the current design philosophy and I think it'd require a ground-up reconceptualization to make it into the feature that a lot of people arguing in its favor would like to see. I don't necessarily think this is impossible but it'd certainly be a huge endeavor -- one which, again, I simply cannot see panning out the way players in its favor like to pretend it will.