Wow, it's crowded. And mobs respawn very fast.
It appears to be a quest hub like the Golden Lotus, except that all three sites are open immediately, so you can do them in any order. The quests all seem to be pretty traditional daily fare so fare.
The unlocking is an interesting idea. However, I do wish that it was more transparent and granular. For the AQ gates, there was a total number of items required, and each time you turned in something, you could see the count decrease. The unlocking for Isle of Thunder just shows a percentage. The link between you doing something and the bar increasing is tenuous.
The rare chase is interesting. Thank god you can share them. I killed one rare mogu with a lot of other people. But people were calling out spawns and coordinating in general chat.
I also claimed the Sunsong Ranch. I like the new work order system. If you don't have anything specific you want to plant, it gives you something to do.
All in all, a pretty good start to the patch. The real attraction is the raid though, so we will have to see how it goes later.