The design preview information on the Lairshaping school showed that it gives 5 per level for Strength, Power, Focus, Dexterity, and Health.
Now to me that seems pretty darn low. Dragon Adventurer gets 7 per level in the 4 stats, Dragon Crafter also only gets 5/level. That one seems too low as well.
At least a couple stats should get some sort of boost from the Regular crafting school. Perhaps 8,9, or 10 str/level. Lairshaping could follow the same for Power.
Plenty of existing construction schools grant nice stat bonuses once you attain the higher levels. These crafting schools should be no different.
Propose:
Dragon Crafter:
8 Dexterity/level
8 Focus/Level
10 Scalecraft/level
Lairshaper school:
9 Strength/Level
9 Power/level