Here's what i found.
1. The first time i installed the update apps were missing ( settings, spartan, photos). This happened because i tried to lock my phone while it was trying to migrate data and somehow it skipped half of the process. After a reboot the process resumed, but my apps were still left out. A hard reset did not fix it. So i had to go back to 8.1 then reinstall 10 again, this time without touching my phone. Now it works.
2. I can't choose photo upload quality in Onedrive.
3. There is no option to choose a notification sound.
4. The time between tapping on an app, and actually launching it is too damn high!
I am using a Lumia 830.
One more thing... I read that devices with 5"+ displays will get "One handed use". Is this available for the 830 as well?