So, they just announced in the Live Letter, that they will somehow be addressing Idyllshire. Using mounts, possibly placing an aetheryte crystal in the hinterlands, etc.
I would like to suggest that, since we already know they can do this to other zones, they implement instances for Idyllshire! I am assuming Idyllshire will follow similar upgrades as Mor Dhona did in 2.0 and will be the main congregation point of 3.0 end game. Main reason would be to help visual performance in the area. I don't have the best computer, but its certainly not bad by any means. I can get 60 or higher fps everywhere but this zone. Come downs to so many people loaded into such a small area.
I don't see any downside to this. You might not be able to get into the same instance as a friend but you can just leave and change instance if needed.
For people that say "get a better PC". I'm running a R9 290, 8core 4.7ghz AMD, 16GB 2400mhz ram, and using a SSD, I am also using dx11 at 1080p.