I haven't got to try the campaign yet and I'm sure this has already been discussed but I have to say that the Dragon is really next to useless, up to a point that I stopped bothering with it anymore. The dragon is gone in a heap of smoke in a few seconds and the damage it causes is trivial, making the dragon suitable only for base stomping, when it's no longer needed. Really more trouble than it's worth.
If you want a glass cannon approach, make the dragon cause a huge amounts of damage in a short amount of time, but I would really prefer the dragon to be a heavy behemoth that can handle at least a small army. To counter that, greatly increase the cost to summon it and/or add a long cooldown after its gone. Make it at least as destructive as a heavy ship.
Otherwise this unit is a waste of time, which is a shame, as this should be the premise of this game, the reason it should be different from other RTS games.
