From what I can gleam and understand from this video you seem to believe Dragoon isn't as problematic as it once was. The only reason it ever stayed legal in the TCG was we had cards to deal with it out of Rise of the Duelist which weren't available to OCG players. Once Verte Anaconda left Dragoon pretty much fell off the map except in decks like Branded & Subterror. Plus....I mean he looks so cool. To cool to be locked up in jail.
It can also be summoned using Duality(hyory ittai) by tributing grand guidnol, Maximus or Fleurdelis, Its also Quick spell, so it can be use at battle phase. Duality 2nd effect also recycle Dragoon+1draw.