Well, the point is that it is not a problem with microG. The fused provider is not working, when it should. There’s no point in apply the patches for UnifiedNLP and not having a fused provider for location. Plus, users that want to flash a minimal version of GApps like OpenGapps are affected, too.
You have a point, though, talking about Google things, but apps requiring Google Mobile Services (e.g. Citymapper) work fine on my Nexus 4 with CyanogenMod and microG, but not on my Fairphone 2 with microG. And there’s the not-common-but-possible case of an app which doesn’t require any Google library and crash because it requires the fused provider, no matter what system for location you have installed.
PD: Thank you for moving it to the GPS thread.