Del, tie one up like I do. Once done and baited, hold onto the bait and the swivel. When you blow on the rig, it spins freely, in either direction. This, for me, is reason enough for adding the extra metal as you say or over complicating things. The only extra 'fiddle' when mounting the bait is to blob the ends of the floss.
Ian, those popups are the most buoyant I have ever seen. This is the reason for the shot on the swivel. It lets the rig sit nicer than putty. I do use a mainline pineapple popup sometimes and it holds up for a good 18 hours on that rig. If I was having problems then I would do away with the mini swivel and use the same floss and blob method on a ring.