I am using yes/no fields as tags.  While not perfect, they function quite well for tagging.  The main limitation is it's not efficient to quickly create and group fields in the property pane on the fly...but could be.

 

Please see attached screenshot of property pane.  Using the screenshot as an example, I'd like to be able to right click on "tags what", select "create new child field" and have the parent ID populated appropriately.  Possible?

 

BTW, one motivator here is that dragging fields to parent fields is very cumbersome, I usually have to try it about 5 times to get it to work, is there a trick to it?  If not, is there a way to improve it?

 

Thanks