Thanks for these, spent a while reading through everything in the two topics you gave. From what I gather out of those request, majority of the users want to be able to add a dropdown together with other block types (e.g. headings, checklist) in the same block, and that this would not be turned on by default to single every block like an outliner.
I would love if they allow using a dropdown together with a checkbox on the same block, to make subtasks. If that’s going to happen then yes my suggestions would be obsolete. However, suggestion number 2 would still make sense to let people change the toggle shortcut key for dropdown to something that the individual prefers.