I can endure the context sensitive banners in Pro, although I am always suspicious how intelligent the banners are...
But there are one particular thing that I found hard to bear: there's no access to the map view using ArcPy!
We are told "Arcpy.mp was built for the professional GIS analyst and for developers", but it's a joke not giving users access to the map view via python. how on earth can developers and analyst represent the result using code in ArcGIS Pro? Using the MapFrame in the layout is not an option --- too weird.
I like the project concept, but can't comprehend the new concept of "map + multiple map views". ArcGIS Pro architect should explain why one map can have multiple views when these views can't even have different layer visibilities?! serious? Isn't map is a view of data by common sense?
Maps, Map Views and Layouts in ArcGIS Pro
If you agree this is a serious issue, please let our voice heard by voting this ArcGIS Idea.
Allow arcpy.mp to change the map extent in ArcGIS Pro
If they can't make ArcMap a 64-bit application compatible with python 3, sooner or later we all have to migrate to ArcGIS Pro. We can only hope ESRI can get it right before encouraging everyone to move over. Get the basic right at least.