Changed my top-priority wishlist entries to:

• A view-based move, rotate and scale tool, for quick view-based manipulations in the perspective view. I really miss this.

• A local coordinate system, remembering the orientation, scale and direction of each object, with a matching move/scale/rotate gadget around it when objects / elements are selected.

Maybe it's already possible. In that case I'd love to know how. Right now my workaround is to set the CPlane to a new object orientation every time, and switch to a front/side/top view to get the rotate/scale gadget around my selection. But that's too elaborate.