If expansion is worth £34.99 then......
Anet never mentioned any intention in making another gw2 standalone campaign. Its not built for this.
Iirc, they even stated that gw2 is the definitive game. There will not be a gw3, and there will not be standalone campaigns. Most likely 1 expansion for each dragon theme, and LS seasons to cover the in between (What I am really up to see, since I like the idea).
I don’t understand the rationale behind assuming that the price of a game or an expansion should be entirely based on the amount of content, as measured in some arbitrary metric, such as number of zones or professions. Most new computer games seem to enter the market at US$40-70 and most expansions at US$25-60. To me, those prices are entirely based on what players are willing to spend relative to how many units the publisher hopes to sell; they have little to do with what’s in the game or expansion.
I believe ANet’s track record is excellent: regardless of the price, ANet has always delivered thousands of hours of entertainment to me, including near 100% uptime for the game, no downtime during updates, and lots and lots of free content, with no subscription. I’m willing to bet US$50 that HoT will be the same.
So HoT could have 3 new zones or 30, 1 new prof or 10; I’m buying it because I fully expect the same high quality fun I’ve been having since launch.
For those who aren’t willing to trust ANet on this (for whatever reasons), don’t pre-purchase — wait to see what folks say about the BETA (including those with Maguuma Portals or those who did pre-purchase). If you need to, wait until the expac has been out a few months. The only thing you’ll miss is the excitement of being there on Day 1 (and the potential bugs or capacity issues that might ensue).