Hey there!
I've installed the 81 version this night, coming from the 49 version. On my 930, unlocked, Europe. So, the installation went smooth, cca 20 minutes to boot.
The good:
- performance seems great
- no loading and resuming screens so far
- seems ok without a hard reset (though I still think I will do it just to be on the safe side)
- my native language text suggestions are downloading and installing, just like on 8.1 (that's a first for w10m)
- keyboard swipe works on other languages than English
The bad:
- Microsoft Photos plug-in is updating over and over again in the Store
- Messaging still crashes when trying to open Skype group chats
- Camera doesn't launch as fast as I would have expected
- Insider Hub not working at all, even the icon is messed up in the app list
- ...to be seen down the road...
Bottom line: a fair incremental update, works fine as a daily driver from what I can see. Still not sure about not doing that hard reset... anybody feeling any improvements after doing the hard reset?