What I will do is trying to sell my MK1. For mountain sports my Fenix 6x pro solar is simply the best outdoor watch I ever owned. Given the discussion in the Fenix 6 forum some people still struggle with WHR and other aspects, for me it's just spot on. Also, wearing the MK1 for three MTB trips and a one day hike the past days for testing the latest firmware, the MK1 feels really heavy on the arm and the display seems tiny compared to the F6x on the other arm.
Unfortunately my dive trip 2020 was cancelled due to covid and my next dive trip is planed for spring 2021. So I will make up my mind about my next dive watch in spring 2021. The MK1 was not a good overall experience for me, however, I liked the dive computer part of it and the GPS function in particular. Will be interesting to see what devices we see on the market early next year.