We have some layers that we upload to our ArcGIS Online Organization account on a weekly basis using a python script. I would like the updated feature service to have a transparency which will display overlapping polygons. The only way I know to do this in Arcmap is to set the feature transparency based on a field value. The problem is that using 'advanced renderer settings' is not possible when uploading a feature service from Arcmap.
Yet ArcGIS Online can display a feature service with feature transparencies, so how can I maintain my transparencies to an uploaded feature service?
No there is nothing new in this area. As I understand it, we do support layer transparency, but not feature level transparency. There are no plans to support feature level transparency. You can promote the idea at ideas.arcgis.com.