http://www.eurogamer.net/articles/2014-01-14-you-thought-that-was-it-for-guild-wars-2
Extremely good article all around that touches a lot of topics. Big one here:
“Concern: ArenaNet won’t stop banging on about the Living World update plan and so will stick with it even if it’s not working.
Not true. ArenaNet is changing it this year.
The original idea was to have four story teams making a month’s worth of content each, to be released in fortnightly bumps, and whatever mechanical features were ready at that time could be rolled in and included. ‘An online world updated more frequently than any other’ was the dream, but the reality was confusion.
“It’s very distracting to players,” observed Johanson. “It’s almost a muddled message, where we put these releases out and we want them to be excited about the story, to follow the story, and we also want them to be excited about the features that are coming with it. And either one or the other tends to be the thing that people cling onto.” And the other thing, people ignore.
“What we’re going to do this year is we’re actually separating the two of those out.”
All the big mechanical features ArenaNet is working on will be held back for a bumper update presumably in the spring/summer.
“When [Living World Season One] ends [on 4th March], we’re going to take a break for a little bit and then we’re going to do one really big feature patch that is more akin to what people see from some of our [MMO] competitors,” said Johanson, "where they bundle a lot of features together into a really big patch every now and then.
“We’re going to provide that experience and have this huge feature build that has a whole lot of gameplay-changing elements, a lot of quality of life improvements, a lot of features bundled together into one big patch. And that’ll come some time not too far after Season One completes.”
tldr: expansion in summer