This whole '' its not useful in competitive play'' thing just doesnt seem accurate. Its a really effective chassis actually. Sure it isnt easy to pilot like a splat cat, dual ac/jagermechs, or stalker lrm/PPC boats. You actually need to learn how to use them. And thats somthing I dont think a lot of people do when it comes to mechs. People find the easiest and most simple way to be effective, and just go with that.
You see the stalkers overheating everytime, becasue they alpha every shot. Or the LRM's boats getting taken out by lights, who then scream lights are OP. And then the catapult cheese build pilots whining that there cheese got cut

.
But you dont hear about the dragon pilots...or the jenner pilots Or even the odd Awesome pilots. There two busy out there, playing the game, and learning to wipe out the cheese/competitive play mechs. ever watched a smaller team, of lights an mediums, completely smoke a larger team? Weapons dont do damage if you cant hit with them. and one medium laser firing , and constantly hitting, will do a lot more damage, than any other weapon, that is always missing due to lack of skill.
What is better. a 40 alpha that can consistenly fire, and hit a target accuratly..or a 70 alpha that is going to miss and overheat the mech? A mech that is probably to slow and sluggish to deal with a faster machine.
That is just how I look at the dragon. It is fast, with the armour to get out of hotspots when it needs to. the Ideal dragon doesnt have many heat problems, and can keep up a blistering rate of fire, while running circles around an enemy. Or it can flank, and do it fast, and do a lot more damage than most people would think,
I think the dragon is a little secret powerhouse a few people have figured out, and are starting to use it in a very ruinous fashion