I'm pretty sure I disabled the write protection using the method above by hroark13. Not sure how to properly test it though. But I did edit the build.prop to get rid of the nav bar and am now using GMD auto hide nav bar, and I've had no issues ( used to fc before and was just a pain in the arse, so I deleted it and re edited build.prop). My thing is, I don't like GMDs app and would like a more pie style nav solution without having to install Xposed. Any tips?
Also, I remember zte having an app that allowed for immersive navigation, I believe it's on the max 2, but I didn't really test it since I didn't have time at the store. Maybe if someone could pass that along I could use that on the max+?
Masterchief, I must ask if you think you can port max 2's Android 6.1? Since you are the only one I have seen doing anything with the max+