All the CAD programs I have used have gimbles for transform, scale and rotate.

Some examples that I have used is Autocad, Inventor and ViaCAD so it is not a tool that is something only polygon modellers use.
It is usually an option that the user can turn on or off as required, depending on what they are doing.

There are plenty of things you need to model and transform that does not require precision, only a good eye and transform gimble. To some extent you have this with edit frames but they are not useful for moving objects and they aren't any good for scaling once you have rotated the object a little bit as they only work on the bounds of the object.

Anyway it is something to consider for future versions of MoI.