I have a dual drag shimano thunnus. I love it for livelining or chunking. I don't think there would be any benifit to pluggin with a reel of this nature. There is no other easy way to liveline with a spinning reel. If you live line with the bail flipped when you flip is back over with line screaming off its prone to trouble. ANd its not a smoot transition, you are playing with the bail when You should be worrying about a good hook set on the fish. The lever on the shimano is in a canvenient place. When I am livelining bunker got Bass, I adjust the looser of the drags so that the bunker is pretty much at equilibrium with the drag. If the bunker gets spooked it can pull a little line. This is a more natural presentation than if the bunker is just wiggling and not moving and inch to get away from the bass. And when the bass does grab the bunker it does not feel the resistance. Then the hook set, dip the poll a little, you can hit it without taking your hand out of position. I can hit the lever with my pinky, while the rest of my hand on the poll at the base of the reel. Click the lever and BAAAAM set the hook. Its a lot of fun. Simlar deal when chunking. Its a lot of fun chunking big blues with that reel also.
For liveling its great. Like I said for plugging I don't see any merit in it. If your clamming for the beach and you are one of those people that spike a few rods I can see the losser drage save you poll from jumping into the ocean if a good fish hits it.