I will simply say that more vertical back equals more vertical through equals less room for error versus a more shallow attack angle. Also bladed chips could be caused by too much weight shift to the rear. What's working for me is no weight shift off left foot during the very small pivot.
I like 3Jacks floating rough technique. May have used that at some point. The fact that I don't remember is a reminder that I need to spend some time on this shot. We have a chipping green surrounded by this sort of junky rough, but I have just been more focused on chipping lately. This week I'm focused on looking at the snow outside. Middle of next week back into the low 40's.
3Jacks comment on lob shots mirrors my own experience. This is a shot that I used to practice a lot. Actually I remember at age 13 or so hitting open face wedges over my buddies house (that would be 1958). When you learn this stuff early, it is easier later on. That said, I am trying to get away from the open stance, ball back stance on chips and pitches. The lob can be overused, and it is a low percentage shot.