Put it on my backup 925. Install went smooth. First preview try, so I can't judge it it against any of the others.
1. Miss Lumia camera, still getting the yellow tint in the photos. The camera has locked up a few times. Had to close it and open it again. --> No idea.
2. Lock screen delay. The longer it sits idle the longer the delay. --> Never faced that issue.
3. Quick action. I went to change the screen rotation lock for the quick actions in settings. It would pause for a couple seconds then crash and revert to the start screen. Only happens with the third from the left square. Others worked fine. --> I had this bug a couple of builds back, but it's no longer here... Although I think waiting like 3 seconds after setting each toggle will do.
4. Store scrolling. Not smooth. --> Give it time to load the page, we all faced this issue.
5. Miss Here Drive. --> I don't use it.
6. Battery runs a lot cooler. Still not sure about battery life yet. --> If you're referring to the heating issues which comes from the Processor (Camera area) not the Battery, yes, It doesn't get hot anymore. But the Battery still drains itself randomly.
7. Came from ATT 8.1 no denim. Miss the day and date on the glance screen. --> You have to set that in the Glance App. Which can't be installed on this build, no idea why, but they're working on it according to Mr. Aul.