I missed the obvious and never tried using the launch option for GearVR. But ABD Wifi is the main problem. I never got above 300 kb/s . While the FTP transfer is 14 mb/s . Having incremental install + FTP would be a perfect solution for development and i’am sure it must be possible somehow to get it working together. But it probably needs a plugin.
After making some tests:
If you make small changes, the launch option is faster.