Improving camera widget

A lot of suggestions are done for the camera, but here is a different one.

Blender 2.80 has lots of new widgets and I think this one could be particularly useful to manipulate the camera directly in the 3D View.

Curently, we have a camera widget that allows us to define:

• the focal length by moving the rectangular "eye" of the camera
• the focal distance by moving the cross along the axis

What do you think about adding the following visual editing:

• dragging the point at the start of the line to control the "Clip Start" property
• dragging the point at the end of the line to control the "Clip End" property
• using the Ctrl key while dragging the focal distance to set the focus on the object under the mouse cursor
• adding a dedicated "floating" point on the axis to allow rotating the camera to a target

I know that could be probably be done with an add-on, but probably be best as a standard built-in tool.