Personally I liked being able to rotate the object with one hand, it's a bit inconvenient to have to hold down another button every time. I like sketchfab's 3D viewing controls. Left click: rotate Right click/middle click: pan scroll wheel: zoom I hope the more ways to pan and rotate the camera can ...

In Cubik PRO, I could see flat planes from above, that made it easier to arrange them the way I wanted. http://i.imgur.com/OCN0KjZ.jpg Now they are invisible from the top and sides so I have to figure out their position from the perspective view. http://i.imgur.com/nyKEZdQ.jpg Just a one pixel wide ...

you can also rotate with CTRL + middle click.