This is probably going way off topic, but hopefully it won't get deleted. (If a mod does want to delete it, please copy and paste it to me first.)
Part of the reason behind the Living Story and no expansions is that ANet rightfully felt that the expansions in GW1 came out too quickly to allow casual players to fully enjoy the amount of content available. I played a lot of GW1 from Prophecies through Nightfall and while I did spend a significant amount of time in PvP, I barely scratched the surface of PvE. I do think they came out too fast.
However, that doesn't mean they should abandon the expansion idea altogether. It needs to be balanced. I think part of the problem is that there are too many people crying out that there is no end game. Which, there isn't. But, I don't think adding content is more than a band-aid fix for end game. The developers feel that they can get by with 2 week updates and I don't even think if the content was permanent it would help. They are basically just adding quests with fairly unimaginative stories.
I know that people disagree with me, but I really think there is a foundational issue. Playing and leveling alts isn't that fun, it is tedious. PvP is lame. WvW is broken.
Part of what made GW1 a good game is that each character actually did something different than other characters. With each alt was a different game experience. The PvP endgame, whether Random Arenas (very casual), Guild vs. Guild (casual to hardcore) or HA (hardcore) - there was something that was inherently repeatable. While PvE is static, PvP is dynamic enough to allow for every match to be different and exciting. So, not only did you have tons of content, you had unique experiences with each alt, and you had PvP. All of these things made the game inherently fun and repeatable.
Not only that, but even farming was interesting. Sure, there was boring farming. But, lots of areas had unique rare drops that we just don't find in GW2. There was an actual sense of adventure and treasure-hunting that I simply cannot find in GW2. Every ecto that ever dropped for me in UW was exciting. Every shard that dropped or chaotic axe that dropped in FoW was exciting.
In PvE I miss these experiences the most. GW2 gives us lots of fun new ways to explore the world, it gives us exciting new combat animations and jumping and dodging. All of these things are great and well needed additions to a 21st century game. What it doesn't have is interesting and repeatable content, exciting treasure hunting and fun PvP. At least not to the extent that GW1 had it.
So, what's my point? The Living Story is a band aid fix. Even an expansion would be a temporary fix. There is plenty of content. The developers are probably working harder than most in the industry just to put out what they are doing. If the foundation was right, nobody would be complaining (aside from some pretty bad story-telling).
Everything in GW2 is amazing the first time you play it. It is fun. It is exciting. It's the second, third and fourth time (etc, etc..) that gets more boring each time. And the only reason for that is that the foundations of the game are problematic.
At least that is my humble opinion.