You've played a game for 5 years, bought multiple houses at
these prices, and now because there are more people playing than SE thought would want to play you should have to give up something you worked really hard for? How is it fair to take something away from a player that they have had for
years because more people started playing the game?
Especially when there are servers like Zalera, Goblin, Brynhildr, & Coeurl that have tons of empty plots available? While this might not change your mind, I hope that it might give you something to think about, and maybe give you a bit of empathy for some of the people on the other side. And the User Agreement we all agreed to when starting the game has not been changed at all since August 24, 2013. I would hazard to guess that while you're correct that SE can change it at any point, they aren't going to any time soon (even though it really should have been updated a few times since then).
I love our ward system. Many others do not. I would like to see the option for those that do want it, and maybe as a way for all characters to be able to have their own house and not just an apartment (or maybe just an apartment if they really do expand them like they said they were looking into).
quick edit - As I understand it our current housing system is not truly instanced with all of the wards from all of the worlds constantly taking up space like the other worlds zones on the servers. While the insides of the houses are instanced, the wards themselves are not.