I started using tail-less soft plastics a few years ago but never with the overhead spinner. Will have to try it. But I am surprised you didn't use a Crappie Magnet with it - a classic lure shape similar to the original used with the Beetle Spin when first introduced decades ago. Curl tail grubs are also one of my favorites used with spinners.
Since I make most of my own soft plastic designs, I found that lure size - other than length - can make a difference especially in murky water caused by suspended green algae in late summer.
Theory: the lateral line is like sonar to a fish and it feels the bulk of the lure as well as the vibration of the spinner. The body of your grub (or any grub for that matter) becomes the focus of the attack but not to eat it. Fish get p.o.'d like humans when intruders (lures or other fish) get too close and attack.
Liked the video BTW.
There are thousands of soft plastic designs panfish in general attack including the Crappie Magnet that are worth trying. Various body / tail combinations have silhouettes and actions that cause stikes. In you case the grub can be used without the spinner and still catch most fish species due to the wobble of the lure as you twitch it occasionally on the retrieve. Try it. The action is magic. I came up with these in spring and they and others like them have be producing big time! :
Variety is the spice of fishing in my book - lure variety that is.
Too bad about the weed spraying. The homeowners had 3500 weed eating carp put into one of my best lakes for fishing years ago and the lack of weeds killed fish quality. It also encouraged the spread of gigantic lily pads that are too thick to fish or get a boat through.