This part: " The goal of increasing your cadence is not simply moving your legs faster but trying to change where you food lands, with the intent to have you feet land underneath your body with you feel landing on their mid foot instead of your feet landing in front of your hips on their heels." is a bit unclear to me.
How do you mean, to lend feet underneath the body, instead of in front? If I would do that , that would make my steps even shorter, I guess. I already have impression that my steps are small, and I was thinking about to how to make them longer, in order to improve my speed.