Just loving all these Miria faces, you can tell the artist is having an absolute blast. I don't remember this
insecure Sherry sub-arc in the novels. Also I dunno why she's so insecure she's a Master Smith slave! They're probably the rarest slaves out there. It's gonna end on a boob joke, isn't it?
edit: Okay now I see the issue, he had Sherry hand Miria the spear and she was given the club and with his comments (directed at himself not Sherry) she took that as a demotion.
The only reason Sherry's not contributing on the same level as Roxanne is because of the sheer scale of material access and funds they need to go all in on equipment crafting.
It's not materials that's the problem, it's how badly designed the exp system is. First the fact that aside from Michio no one knows that there is an exp system, but second and more importantly Master Smiths have a sort of ritual for their growth because of the unknown exp system, I think Sherry said it was 6 months of creating a Misanga twice a day before they would normally move on and she's already far exceeded that.
Like he's already caused Sherry stress and anxiety by refusing to tell her he can see slots, or that he figured out the requirement for her to become a Master Smith. Or put party members in danger because he changed their job (temporarily weakening them) and didn't tell them.
He should die without telling anyone how to unlock Master Smith. That would cause so much social and economic damage that it would potentially shatter the world. As for changing the jobs they generally wouldn't care as they don't believe they even have levels outside Explorer.