Some of the best SLO MO footage of the stivot yet.
Pole usage has been discussed many times both here and elsewhere. In slalom it may be thought of as a third point of contact that can be used to add stability through the transition, provide a pivot anchor point, or be a movement trigger. Considering the need to make very dynamic direction changes in very little space, it's east to see why a pole plant would be a good tactic. Contrast that to GS where the skier may not be moving quite as dynamically and the direction change occurs over more distance and time. This extra time allows the racer more time to recenter and thus makes the pole plant less necessary.
Back seat and inner ski can be fast, and in racing I think that technique should be judged by how fast it is. It is really difficult to pull off though.
IMO Bode has good technique for racing, but it is not something I would teach my juniors.
In ski jumping there was a skier called Jan Boklöv who started to use the V-style. Everyone was saying that his technique was bad, but he jumped further than anyone, and these days everyone is using the V-style.