Minimal inputs for global transform

[JMR]

what if
One single reference point could be used to translate a chunk to a given coordinates keeping scale and angles as they are.
Two reference points could be used to translate and scale keeping angles about x and y while rotating about z
wouldn't it be useful for many of you?
what if the trackball could be constrained to work with the Z always vertical for referenced chunks (similar to the terrain mode but in a more standard way). When the Z axis is tied to gravity (most of cases) one wants vertical objects to stay vertical
Regards,