I rather see them putting time into guildships. Which lets be honest is pretty much the same idea as housing but atleast guildies will be hanging around in the ship, rather than you being alone is some neighbourhood on dromund kaas/Coruscant.
This would be great, somewhere to go and hang out with guildmates, while still having access to the GTN, PVP and PVE quest terminals, etc. If they wanted they could even have a list of materials that the guild to gather up in order to craft the ship as well, and if done right and made so that it's not super easy to get, would be quite the accomplishment for a guild. Some customizable things on the ship would be a given.