As someone who has been RPing in Guild Wars 2 for about three years now, let me start off by saying that I'd love to get features promoting and encouraging roleplay in this game. Tyria is a beautiful and interesting world that warrants such interests, especially if you're out of ideas of what to do next. That's how I eventually got into it.
The truth, however, is that that the RP 'community' is so miniscule in comparison to the rest of the playerbase that, even if Arena Net wanted to, there'd be no point to implement features boosting roleplay alone from a cost-payoff point of view (*gestures at the mostly empty Roleplay forums A-Net added not too long ago*). And I'm quite sure that there never have been such updates in the past (toggling walking/running is something I would consider purely mechanical to give the player better control over their character). On top of that, the 'community' that makes up the players is no actual community at all. Rather, it's a loose collection of small groups with varying interests. That, together with the total amount of maps there are in the base game alone spreads the already tiny population of roleplayers even more. There are no popular gathering spots besides Divinity's Reach either.
And, while I agree that player housing might remedy some of the above-mentioned problems, it'll need to do much more than simply providing living space since, otherwise, it'd be not much different from instances. Which is already a feature in Guild Wars 2. It'll need to be attractive to all of the playerbase. The same goes for probably about anything else you can think of.
One example would be the redesign of the social system (friends list/ LFG etc.) or granting access to actual libraries with the summary of all the information there is to know in the world of Tyria. Things that draw you in as a reader and a player. Small details that further improve hard world-building, as opposed to soft (as it's mentioned a bunch of times in the lore forums), that further help to make sense of it all (laws, traditions, social structures to name a few). I know of at least a bunch of people who gave up on getting into roleplay simply because it's very hard to get actual information about the world you're in. Plus, a big portion of the game is behind a paywall of gems that no new player can purchase through gameplay alone. At least not in a reasonable time frame.
So yeah, these are my two cents regarding this topic.
Additionally...
I don't see any reason why Arena Net would want to implement this. Can you imagine going somewhere in a city map and you suddenly find yourself surrounded by half-naked characters in swimsuits? That's hella weird not only for the average adult players but also for anyone who isn't one. Plus, it offers nothing you don't already have in the form of some outfits or clothing pieces, so... yeah. No.