This is a very re-freshing idea!
Also, kudos for a clear and informative video - I wish all product videos could focus more on the product itself rather than on the latest tricks that the company team riders happen to be throwing.
I don't really see the point in this
The point is having a clean, above-the-bar depower system with no dangling depower rope. I don't know about you, but personally I have several times had a dangling depower rope twist itself around the lines, sometimes actually tying itself into a knot around the center lines. That can make it take longer to adjust the depower (because you first have to sort out the depower line mess), and in a worst-case scenario I think it could actually disable your ability to release to safety. Also, on two occasions I've had a dangling depower rope twist itself around a bar-end - not a nice situation.
Personally I really like the clean uncluttered look of this new approach. I'd love a chance to test it in practice.
That being said, I agree with this:
What if for example I'm full powered - a gust hits me and Ì'm going to be overpowered. I have sheeted the Bar out for minimum power - but to get less power with the adjuster - I have to Sheet the Bar IN Again (creating more power in this moment)?
I think this is a valid concern... It appears that for every inch that you effectively shorten the front lines by pulling on the the adjuster, you would have to pull the bar towards you by more
than one inch, thereby actually temporarily powering the kite up more (until you stop pulling on the adjuster and can push your bar away again). That is obviously not ideal.
Also, I don't like the idea of a small pulley being part of the depower system, given the amount of load on the front lines. That seems like a possible point of failure. It might be better to replace that with a low-friction stainless steel ring instead.