So far so good here!
We were experiencing many DB deadlocks which mostly seemed related to iOS/App distribution.
We have not had a single one in this version.
No negatives that I have experienced. Did the update on 12/22/16. A few new features too :) 4200 iOS 2200 OSX
I went to it last week, and today I've noticed a couple weird quirks..
I tried to pull a specific machine and submit to GSX, but the Action and Export buttons weren't showing up. I logged out and back in, quit safari and went in and tried again, still didn't show up. Eventually I did a full search on all hardware and then the buttons showed up, and haven't gone away since.
The other is when I try to submit my Summary to JAMF, I check the boxes, click submit, put in my login credentials, and then it returns me to a shortened check box screen with only Computers, Mobile Devices, Users, and Database. So I recheck all and submit where it prompts for the login again, and then back to that checkbox screen.