My alternate view:
Don't know their reasoning, but I like the single loop. The spider web shape has a lot of drag in the water. A thicker profile, like the 8 inch spider coil on my CZ-20 has more drag than the HH Pulse 11 inch coil does. When working in the shallow with moving waves, I want as little water drag from the coil as possible. That is one thing I like about the 11 inch HH Pulse coil, no huge water drag.
I can't say I've had trouble pinpointing. A couple of sweeps over the target while visualizing the coil position helps, then I place the coil on the bottom where I think it is centered and place the tip of the scoop at the back edge of the coil. Where I can not see the coil, I place a foot next to the coil then start the scoop off of my heel and pointed towards the center of where the coil was. I use either a scoop that is 6 inches in diameter or one that is not round but has a wide 9 inch width. A big scoop helps if I am not on center with the pinpointing.
Cheers,
tvr