I think the general reaction when it comes tot he Dragon cards that are being announced is "meh". Their attacks aren't anything spectacular - most of them have no side effects aside, they are bare bone attacks. The energy costs are crazy random, making them hard to fit into any deck unless excessive Prism and Rainbow energy are used. I don't see too much play coming out of these cards - aside from being decent Dragon card counters. Though, none of the Dragons so far have been too playable in the competitive format.
We'll have to see what Dragon Energy looks like. It will be the crux - will it provide multiple types of energy? Increase damage, reduce damage, or some other fabulous effect that will make these cards more extravagant? We'll see!