Not sure if this is something you can do currently, or if it's been mentioned, but an option to select any object and click a button to zoom right to this object, which is then centred in the window to allow you to rotate the camera around this selected object. I know you can do this when creating track pieces and pathways to an extent, but to be able to look around an object or a selection of objects easily would be a great help when designing things like buildings etc.