Bear in mind the main content of Guild Wars 2 is cenetered on Dynamic Events and PVP.
Both patches so far did add dynamic events and PVP areas.
Aren't they?
http://us.battle.net/wow/en/blog/730...ere-10_18_2012
^ Seems like a lot of content to me.
The wiki page for WoW's Halloween events is huge, there are guides for Halloween and seems to have content added progressively.
Well, they have had this Halloween event since 2005-6ish. Fairly consistent with past installments of the franchise and comparable to contemporaries.