We always book SV and are on Edge right now in a center SV on deck 9. While we have had quite a bit of vibration, we’ve also had some nasty weather. It’s a bit chilly in Alaska to use the balcony very much, but have been out there several times… no soot or smell, but the chair seats have def soaked up some dirt… lol… very little shade, so balcony use might be an issue with a hot climate.
Regardless of the drawbacks, we have no interest in an infinite veranda, so just make the best of whatever comes!