I had the issue of the APPS not updating which forced me to go back to 8.1 and then update to 10586. I like the new build. I do have to say there are still issues with:
1.) Bluetooth connectivity not being always there as sometimes I hear the sound broken up and can even see it when a video is playing. Kill BT and then everything works as it should.
2.) Netflix dies from time to time, not often but it has happened once or twice.
3.) Messaging still has glitches, it wont say "Resuming..." anymore but it might as well as I see the blank screen (black) when launching it from the notifications menu.
4.) I can see a faint glow on the screen when I use the power button to turn off (this was a bug too when 8.1 was released, maybe from glance?), I can notice it at night, when its dark as you see the small flash happen each time.
5.) Still the TMOBILE SIM issue, I have to add it to the access point even though it creates the exact same access point but it is unable to use it for some reason. You add a new access point with the exact same info and it works.
Other than those, which have been an issue for some time, this build is almost ready for what used to be RTM, maybe it is RTM but I think it could be polished just a little more before calling it a true RTM build.