I will tell you a few things that I dislike about the idea of boom sheeting.

I need to pull my boom down toward my rear cross bar, not toward the windward hull.

I like to pull in line with my feet so that it actually makes my footing more secure. With a boom sheet, I'd be pulling my body toward the center of the boat.

If purchases are run along the boom, this increases compression load on the boom, so bumping into the boom could be more of a problem than if you were not using sheeting purchases along the boom.

GARY