This may actually be less of an issue on King than it is everywhere else.
As I think about this, I wonder why the right turn light is being treated as an "advance" green. It's more of a case of a regular green light, that has an arrow instead of a full lens, to remind the driver that the right turn is their only option... in case they miss the no left/no through sign. The right arrow green is not granting right of way over opposing traffic in the same way that an advance left turn arrow does. Nor does it restrain pedestrians any more than a regular green light. (At a regular green light the HTA requirement for making a right turn is to yield to pedestrians who are legally crossing in the direction of the green....which I agree is frustrating when there's a steady stream of them!....but it's normal). This is no different.
If the HTA says that a right green arrow gives priority to the turning car over pedestrians, then maybe we shouldn't have used them in the design.
If you assume that the only cars on King will have been making local stops within that block of the mall, the right turn to exit King will feel much more like exiting a parking lot than making a turn in traffic. Yes, it will take longer, as there will have to be a gap in pedestrian movement, but so what? There will not be a line of cars piled up behind blowing their horns impatiently.... the mall will be inherently calming. Just turn when it is safe to do so.
- Paul