Everyone who's accusing him of stealing a team- are you seriously telling me you didn't see these pokemon and these sets on just about every other team? Scarfgon, Shucatran, CB Azelf Lead, Chesto Rest Kingdra, Sub gengar, only thing a tad out of the ordinary is trick + iron ball metagross. Other than that, complete cookie cutter 4th gen OU we've all seen a million of.
It is a very good team however stale it is, most 4th gen teams make me sick, at least you dont have a FWG core. I don't know what to improve on as your members compliment each other well, everyone uses Vaporeon for Gengar last I checked so you can boom all over those, clearing the path for Kingdra. Kingdra has great synergy with Flygon, not only being the only revenge killer in the game but also giving you a double dragon team to play with. Your team is a bit weak to Bullet punch luke if it somehow sets up, as well as a well played Gyarados, most Flygon (and probably yours) just come in and thunderpunch away. However, CB Tar can switch in and OHKO with Pursuit. Again I dont see any change that would benefit your team overall, just telling you to play carefully against those two.
Good job with the team and good riddance of the 4th gen.
Edit- I started reading A Farewell to Arms a few days ago lol!