It would be extremely helpful to have increased debugging functionality (intellisence, syntax checking/highlighting, variable assignment error highlighting, etc.) within the Expression Builder in ArcGIS Pro, particularly for Arcade. I am aware of the capabilities of the Arcade Editor in Portal/AGOL and the Arcade Playground, but this does not help me with Attribute Rules, as the code for these (and the associated functions, variables, etc.) is not accessible with these tools at the moment.
