Even if you do set blind drive to 0 xp, or nearly 0 xp, I do not think people will mind the fact that they are ruining a spawn for somebody else. They will just continue doing what they had previously been doing. Whether it is buffing the dungeons that are actually already hard to do overall for a group that doesn't know what to expect, and pretty challenging even if you know what is coming next, or the blind drive suggestion from EO, it won't make the dungeons less frequented. Actually I think people would keep hitting the dungeons and complain that they have not gained a level after a month of dungeoning even if they were told they get 0 xp at the level of blind drive they are in.
Instead of changing the xp system, perhaps introducing revamps to the already available dungeons or bringing in more dungeons, and perhaps introducing a better Dementlieu, where rp is not sucking up to nobles and feeling left out if you are not familiar with mustache twirling, backstabbing RP and have no interest in it, you can fit in.
Even if somehow though all of those changes were made to dungeons, they were all revamped, xp was cut to 0 when on blind drive and different solutions to rp were introduced, people would continue doing the same 5-6 dungeons they continue doing right now because repetition can be fun and a lot of people play to put their class features to use.
In the end, I think everything is fun as it is and I don't think anything needs change, but perhaps we just need more environments to travel to and more content.