This discussion clearly needs to be moved over to ESH - I see your points, but I would also like to stress that the current setup worked pretty well for many bindings already, so I think it is a valid “default” way of doing things and we can discuss what extra additions we might want to have for other situations.
FTR: At least some of what is discussed here is continued at https://github.com/eclipse/smarthome/issues/583.
