Yeah I feel you. I was the same way when I came to Android about two and a half years ago. I really loved Windows Phone but a lot of stuff is outdated including the camera app which still does not show live preview for ISO and shutter speed chamges or did they finally add that in? I'm looking to return with the eventual, finally released version of the much dreamt about Surface Phone but I will not be using it exclusively(if it ever gets released) rather alongside my LG V20. Unless Microsoft makes up some serious ground but I have yet to see that.
I know for sure that live feature still isn't in there. They haven't updated much of anything. I loved windows too but Android does so much more and more polished. Even simple things like apps being able to write on top of other apps or being able to play music/video with audio while on a call and maps/navigation is so much better.
There's a couple apps I miss that aren't on Android surprisingly like instaget universal, and disqus.
I"ll definitely keep a eye on windows tho but they've got to do something about the app situation
(And let us know if you need help with your new phone!)
The Axon 7 is a great choice! The stereo speakers are pretty cool. 
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