Buying the features you like?
I’m sure you’ll have to buy the whole thing, because it’s presented as a package. It’s like when you go to Disneyland. You pay for admission and you ride what you want.
That’s not really how expansions work.
What happens if more people bought more PVE than PVP content or vice versa. We get a minority niche that gets underserved since the money is in one section and not the other.
Also, from a business perspective, it just makes sense. Why have only one part of your development team contributing to the content released by the expansion, when all of them can contribute to them, all supported by the combined price of the expansion? On the basest level, it just makes more sense to have one big lump of content to pay for on this scale rather than piecemealing it, given the development costs of these features.
I would pay an expansion’s worth of money for one feature, a proper tracking in-game camera with decent FoV. This game is a nightmare for kiting classes. Having to manually micromanage your camera in fast action in space restricted areas is a disgrace, and besmirches the whole GW2 franchise.