Currently, Craft Mastery grants you 1 extra CP per hard rank, and 1 mundane dweomercrafting tier every 10 hard ranks.
For a spellcaster who gets dweomercrafting tiers anyway, the skill becomes somewhat less useful due to the redundancy; a dweomercrafter with 3 tiers magical and 0 mundane is not any better than one with 3 tiers in both.
It may be intended, but it feels odd that a character who invests fully into Craft Mastery actually is not any better than someone with zero investment at all in terms of quality, as both have the same 60 Trade Skill Points to allocate.
Would a slight buff to the skill be in the cards, such as, say, 5 extra Trade Skill Points for every 10 hard ranks?