The whole WinRT/.NET model of WP, and the respective tooling is miles ahead of what Google has managed to pull out of Android.
Even the upcoming Android N with Android Studio takes lots of more resources than VS, doesn't provide a proper experience for NDK users and there isn't a Support Library release that isn't followed up by a quick fix release.
I really don't understand where the skilled developers that master the Google interview process end up working, surely not on Android.
However the WP in small form factors is dead, with the latest promise drop of the 512 MB WP 8.1 devices not getting the WP 10 upgrade they lost the last faithful ones that still believed.
Where it might thrive is as tablet OS, but lets see.
Windows phone apps were the most profitable to write unless you had a blockbuster as your app was actually likely to be found in the app store but why bother when they kill it with what can only be called anti-marketing
And you don't have to spend ages trying apps and giving random developers access to your phone in order to achieve this. And app-less WP is much nicer to use than an stock Android, which in turn is much nicer than all the vendor or carrier mutilated Androids.
It's a smartphone; communication is its entire raison d'être. Those things ought to be awesome right out of the box and, on Android, they're definitely not.