Having just completed a render using lots of images (28) and 3 populations of objects/TGO's a couple of possible improvements came to mind.
First, it would be a real improvement if when positioning objects in a scene you could selectively lock the x,y,z handles so that if you need to move an object in the x direction, locking y and z would remain fixed and not need further adjustment. This applies to population editing as well, with individual objects in populations often moving in 2 or more directions at once.
Also when you change the colour of an object or part of an object, as you click ok in the colour picker why does the render window reappear? This is really annoying especially if you test render is large or full screen. It dosen't happen if you change an image map for example, just when you change colours. Can this be changed?