> I'm interested in pushing Smart Mapping ... to the Operations Dashboard Maps ...
FYI, Operations Dashboard for ArcGIS does support smart mapping in web maps. So you can configure your web map as you like in either the ArcGIS Online or Portal for ArcGIS map viewer, then save your web map. When the web map is opened in Operations Dashboard, the smart mapping settings should be displayed and honored.
> are there other options for symbolizing different attributes in maps within Operations Dashboard
The isn't really in the design scope of Operations Dashboard, to enable advanced symbolization options in the map element. The workflow is to configure your web map display settings in the ArcGIS Online or Portal for ArcGIS map viewer first, then bring it into Operations Dashboard.
> When will Esri support customization within the Operations Dashboard?
There are currently no plans to enable this functionality. If you want a specific feature enhancement, please post your request on the ArcGIS Ideas page.
Hope this helps,