A little off topic, sorry, but...
Christianedward, what sort of issues are you experiencing with the Bluetooth connection to the Garmin watch? I ask as both my wife and I now have an Honor View 10, but she is unable to get the Mi Fit app for her Mi Band 2 to keep running in the background which means that it doesn't keep a Bluetooth connection open for her to receive notifications via the bands. I was wondering if this might be the same issue that you are talking about? We have tinkered as much as possible with permissions and battery options to allow the app to run in the background, but it just doesn't work like it did on her previous phone.
Lineage 14.1 will not work without the updated firmware that came with the stock marshmallow update, try flashing this firmware-update.zip to see if it will help otherwise you will need to install the twrp flashable stock marshmallow from http://www.modaco.com/forums/topic/378390-smart-ultra-6-rom-601-with-root/ then come back to lineage 14.1
I could have done with this 2 weeks ago when my Nexus 5X bricked itself. Spent a week reading stats, wanted USB C and NFC, also fancied a larger screen but that pushes the price up. Ordered a Wileyfox 2X but the Amazon seller let me down, then picked up a P10 Lite (only in Black sadly) when Argos dropped the price of the 7X, so I swapped the order to that, only to find Argos had the wrong stats and NFC wasn't on it!
So I dropped down to a P8 Lite which was in Honor Blue (only from CPW) and bar the Micro USB was had very similar specs to my dead N5X and was just £130! Maybe I should have waited for the P9 Lite but I glad I didn't plump too much money as I have since found out all Huaweis have a known issue using Bluetooth to Garmin GPS watches.
This week a beta update came out for my Garmin (735XT) and it fixes the issue.