This paper develops a scale for the impact of adaptive structuration on Web technology structures and user structures. An earlier scale of "reinvention" required comparison against "ultimate functionality" of the technology. This is not practical with a website that is continuously under development. The new scale has, in order of increasing impact on the structure, four key points: refine, extend, redesign and transform. When considering a possible change, the change should be placed independently on the impact scale for each relevant structure. Whether the changes emerge or are planned, placing each change on the scale will give an early indication of the potential impact of that change.