If you mean there is no setup wizard after installing the gapps then it will take some time for gapps to be fully compatible.@Shujath
After the install, no recovery comes from the device.
Factory reset not possible
I can't restore my APPs, SMS, ..... everything.
Can you remove the search bar on the homescreen?
The display on/off in seconds cycle is also there.
To factory reset the device you can flash userdata.img in fastboot.
Can you test this new version if display flickering is still there for you?