Many of us spent a lot of time with microflow editing. Drag and drop can help in this case.
The idea is to allow drag and drop in the microflow editor. You can drag a variable or object to a split in stead of selecting it from the autocomplete list. In some cases the autocomplete list can be long, but you know exactly the visual position. Click on the grip or drag handle and drag it to the split. Maybe the modeler can add the '=empty' because that is convenient in 50% of the cases.
Examples of dragging I imagine:
Drag a list on a loop
Drag an action return variable (if list) on a loop
Drag an inputobject, list or object on a commit
Drag an inputobject, list or object on an end event
Drag an inputobject, variable, list or object on a split
Drag an iterator on a change
Maybe dragging to an empty space gives the option to select an from a list of available options.
Let your imagination flow and add some to this list.