I think more people should consider taking a hadesdrake instead of the baledrake. At a certain point, you saturate infantry killing need of your army, so adding some tank and flyer busting power couldn't hurt. You still retain vector strikes if you REALLY need to kill MEQs.
I wish people started to consider the Hadesdrake too...mainly because I want to face less Baledrakes
Seriously though, this is terrible advice. Mech has died down so much. The Baleflamer Helldrake is one of the best units in the game. The ability to threaten most troop choices anywhere on the board, wounding on 2's, ignoring all but 2+ saves, and ignoring cover is incredible. There is no reason to ever consider the Hades Autocannon.