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Still, it seems like a rather weak card for a legendary. Especially compared to some others.
I thought that for a dragon to be truly effective, it needs things like:
1. The ability to unlock evolutions earlier than rounds 4-5.
2. The ability to use more than 10 play points per round.
Corresponding legendaries:
1. A 1-mana 0/1 card that allows you to evolve other crafted units while it's on the field. This would also make "Ethics" useful, and so on. It doesn't seem overpowered, as it replaces something insignificant, but at the same time, by the third round, you can already do something decent with 4 mana.
2. Some kind of 10-mana cadaver, maybe even a weak one, that puts a spell in your hand when it enters the battlefield. The spell costs 1 and restores, say, 4 play points. And maybe draws a card. Or even two. So, you can't play it in the same turn, but in the next turn, you'll have +3 play points.
The numbers are just off the top of my head, but I think these are good ideas for synergy with the dragon's mechanic.