Do us testers just wait for Update Zip or do we have to do a fresh install on top of Dev Build already installed.
You can update from the development build directly. Keep in mind that only the latest dev build (2017-07-04) is able to update from img.gz if your're running from internal memory. If you use SD card for LE, you can upgrade any dev version to the release build.
There's still an issue with the S805 builds after 7.0.1.4 on the v2.0 boards (at least the one I have available)
Video playback is very jerky and glitchy. The audio seems to playback normally while the video jumps around.
The issue does not exist in builds prior to 7.0.2.1
Please verify your playback settings, i.e. that you have hardware acceleration enabled and frame rate automation turned on. If you can, please compare Kodi settings between a board that plays videos well and the bad one.