ArcGIS Pro has a superior interface for authoring weblayer symbology. It would be nice if you could use it to edit an existing webmap then simply share but overwrite an existing thus maintaining the webmap id.
I spend a lot of time managing AGOL webmaps for use in Collector for ArcGIS. I have to make changes to various existing web maps on a daily basis. The only way to manage these web maps seems to go on AGOL via web browser. Our internet can be unreliable at times and just adds to the poor inefficiencies I have to deal with when changing a web map, either by adding a new layer even changing symbology. The inefficiencies come from going to one item page to clicking to another item page, and then going back to opening the map viewer, and so on and so on, just waiting for everything to load. What should be a 1 second task can turn into a 5-10 minute task if you do not have the most reliable internet speed.
The ability to manage these web maps via ArcGIS Pro should be a no brainer.
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