Just an update, received the official flip cover and the sandstone. As much as the flip cover works excellent with face unlock, I just cannot get used to it. Makes waking the phone and then using it a two hand experience every time. Granted, some may say this phone is a 2 hand phone anyway, but I have large hands.
The sandstone on the other hand is amazing. I miss not having the thicker bumper around the case that is on the Nylon case, but having that sandstone feel really improves the grip and just feels awesome. Highly recommend it to anyone wanting a case but not needing "otterbox" type protection.