Drag & Drop Blender 2.9 Suggestion

Drag & Drop Modifiers are great. Guess there are plans to extend it to all the modifiers, inside NLA Editor, Video Sequencer, Dirvers, Grease Pencil, Constraints, etc... This can be added to another context boxes that work similar way.

Here is a list that I think need also this feature:

• PROPERTIES

  • Custom Properties

  • Object

    • Object Properties : Collections / Add to collection

• DRIVERS

  • Add Input Variable

Probably there is a lot more that also need this feature.

Also, Previously we had access to 'Edit Source' and Phython Code using developer extras inside the modifiers. Are this areas going to work like Edit Mesh "Transform" Tool Panel, and not going to be that easy to access?