Is anyone having issues with build 10.0.14946.1000? My phone is restarting by it self and just buggy after this install, just disappointed since this is a premium phone. Any inputs to revert back or fix?
you could try a hard reset , that is factory resetting your phone. Many a times this could solve such issues that you may face on insiders. Furthermore if the issue still persist i would strongly suggest you to roll back to the public version of windows 10 which is much more stable and reliable than the fast ring insiders.
As you mentioned that you feel "disappointed since this is a premium phone" , let me correct you there as your phone is meant to perform its best on the publicly available software and not the one that Microsoft releases to insiders , though there is no harm in doing that but insider builds are half cooked or incomplete and can leave you with multiple bugs and no solution at times. I believe you understood clearly what you are stepping into before joining the insiders and you can never judge the performance of a device running an incomplete software.
Those of you running insider builds really don't have any basis for complaints. It's essentially beta software and often behaves in an unstable manner exactly as beta software often does. You accepted this when you became an Insider and loaded the software.