There needs to be a reward you can only get from completing the invasion. Farming is part of all economy games, that's not surprising to anyone. I can't say "hey guys, stop farming". That's silly. It's part of the game, no matter what anyone says.
Instead, there are really only two ways to mitgate that kind of behavior: Tailoring rewards to fall at the end of the overall goal, rather than during. The other is to make the result a permanent inconvenience, something Anet's been shy of. The best example of these are CoE and CoF. If we don't do the event, we don't get access to the dungeon. This is often an annoyance though, so I'm not sure how to make this work.
There are certain core elements of GW2 that make it difficult to ever really answer a lot of its own problems. The focus on DPS is one of them. GW2 is a massively schizophrenic game in design. It wants to be many different, conflicting things. In many ways, I agree with many of the people that say GW2 is not the next "evolution" of MMO's, whatever that actually means. If anything, it's a refinement of many MMO aspects. But it's certainly not that "next generation".
MMO's are a vague, weird genre where fans actually don't often know what they want. They want this world that appears to be living, but they absolutely don't want to be inconvenienced. They want permanent change, but complain when they miss something. Everyone has this grand idea of what an MMO should be without considering the fact that many of the things they want aren't actually fun in practice.
/end weird rambling rant/ponderings
Instead, there are really only two ways to mitgate that kind of behavior: Tailoring rewards to fall at the end of the overall goal, rather than during. The other is to make the result a permanent inconvenience, something Anet's been shy of. The best example of these are CoE and CoF. If we don't do the event, we don't get access to the dungeon. This is often an annoyance though, so I'm not sure how to make this work.
There are certain core elements of GW2 that make it difficult to ever really answer a lot of its own problems. The focus on DPS is one of them. GW2 is a massively schizophrenic game in design. It wants to be many different, conflicting things. In many ways, I agree with many of the people that say GW2 is not the next "evolution" of MMO's, whatever that actually means. If anything, it's a refinement of many MMO aspects. But it's certainly not that "next generation".
MMO's are a vague, weird genre where fans actually don't often know what they want. They want this world that appears to be living, but they absolutely don't want to be inconvenienced. They want permanent change, but complain when they miss something. Everyone has this grand idea of what an MMO should be without considering the fact that many of the things they want aren't actually fun in practice.
/end weird rambling rant/ponderings