I’ve switched over to using these Stealth bobbers, also by Thill. Much of the body of the bobber lies under the surface, and there is only one place where the line contacts the bobber (below the surface), rather than running through the entire length of the bobber from top to bottom.
For stops, I’ve switched over to the small rubber stop/bead combo. The tiny piece of rubber is still very adjustable, and I think it’s easier on the main line than a knot.