I have moved on from this progression, but have kept Swivel Hips as a regular in my warmup circuits
I have found that the movement has grown richer with time, and continues to be of benefit to my hips
One cue that has helped me is to imagine a length of string between the knees. As the first knee moves out and down to the floor, this string is taughtened. By imagining that it is the tension of this string that causes my second knee to rotate in and down (and by 'pulling out' as I move in to keep this "tension"), I have found that I can keep my hips much squarer, my gluteus more firmly on the deck, and the whole move just feels better