Had a problem with the ESPN app (not updating scores while open) since previous builds. Once this 15007 build was installed, I attempted to reset ESPN app. After the reset, it wouldn't open. Tried uninstalling - nothing happened. Tied re-downloading but got error after error. After a soft reset, I could re-download the app (although it "appeared" to still be installed) and, lo and behold, it seems to be working fine now.
Also, Skype Preview live tile now shows new SMS messages (which it never did for me before). Phone seems to be running fine on this build - snappy and cool. Can't wait to get an SMS in the car to see if Cortana's reading of texts over Bluetooth is really improved (as promised in the release notes) - it was working for me before, but not smoothly.
All in all, enough to restore my 950XL back to daily driver status (and put my Nexus 6P back in the drawer for a while).