Why would bronzong help? Furret SW didn't help LEGENDs any. Bronzong is a bad furret: it costs an energy, takes a lot to retreat, and cannot really attack. Unless we get oracle within the near future, Legends will be impossible to play. Bronzong basically gives away a free prize, wastes an energy attach, and requires a warp energy/switch/warp point. It slows you down more than it does good. I think I'd rather see Smeargle as a starter in Legend decks...
ERL was played a little bit, but now it is just ok. I'm sure it'll see a little bit more play sooner or later. Otherwise, none of the other legends are really playable in a competitive environment. They are always too cumbersome to play