An update via FOTA will be released this friday. That will fix a lot of issues.
The development of the Android 7.0 upgrade is also in progress but we don't know the release date yet.
You can buy a complete screen here: http://bit.ly/2hmYxDQ or only the touch screen panel here: http://bit.ly/2ijsFhZ
Replacing the whole screen is a more expensive but much easier to process solution.