One thing that's always bugged me about the Craft approach on PotM is that, apart from the Ability requirements and the Muse feat, it's pretty divorced from the game mechanics. At first, this may seem like a positive feature, but this has a consequence: it means that the true cost of crafting has been displaced from game mechanics to the grind.
I don't think anyone would be happy seeing game mechanics completely replace the grind on PotM, and indeed in many ways the ship of design has sailed. But I think there's still space to re-introduce
some game mechanic elements (namely Feat investments) to try and find a better medium.
So when I suggest the following Feat, these are my objectives:
(1) reduce the grind a bit by trading in a Feat for the privilege
(2) create game effects that encourage people to seek out mentors to roleplay while crafting and reward them for it
Feat: Craft Prodigy: <Craft>
You may take this Feat more than once. Each time, it applies to a different Craft.
When making a Craft roll for your chosen Craft where you suffer the -5 penalty for not knowing a recipe, failed rolls are rerolled once. In addition, you always reroll natural 1s once.
In addition, whenever another player character near you is flagged to earn RPXP and their Craft Level is at least 5 levels lower than yours, they get 50% more Craft XP (round up) on rolls in your chosen Craft.
So this Feat has two effects: it helps the owner a bit, and it helps potential mentees a bit.
I think this Feat will achieve the objectives outlined because it doesn't radically alter the maths of Crafting. There's no bonuses to rolls; rerolls help the Feat taker be more efficient with their crafting materials and time, but this will not be dramatic IMO. And the Feat directly encourages Mentor RP meaningfully, since a PC has to be flagged to earn RPXP to get 50% extra XP.
If the XP effect isn't quite workable due to technical efficiency, then I propose replacing it with the following:
In addition, other player characters around you get +2 to rolls in your chosen Craft.
In other words: this is the Muse effect, but restricted to a single Craft, and it can be taken after level 1.