When you insert a road component, it would be ideal to have more grips on the transition and other zones. For instance, you can grab the transition zone and move it back and forth instead of just the black grips. Or you could grab the center of the component and move the entire piece back and forth along the alignment. This would be much more efficient instead of moving each black grip one at a time. I would also suggest the zones between the grips highlight a magenta or yellow when you mouse over to indicate you could grab that particular zone.
