Maybe more of physicall coorporation of all jobs? Some sort of logical tech tree, with tools, furniture and equivalent upgrades, instead of useless grind. If a carpenter is practicing his job for a long time, he’ll be a master of his work, but it won’t really unlock things for other jobs, right? So he would have needs for better tools, rarer/refined ingredients and maybe even more specialized furniture which can’t be crafted by himself.
The carpenter/potter/mason would be the 3 base classes, all got basic tools and they can build their own starting furniture, right? But a cook who build his own oven or even mill, or a weaver making his own spindle or a blacksmith without a proper furnance doesn’t feel immersive. So instead of pretty high level requirement to unlock new jobs (be it the talsiman or even as requirement to upgrade the class itself), how about more smaller steps.
A mason is required to craft the tool and the furniture for the cook, but the furniture unlocks only if the cook levels up, so while he levels up the cook also needs more things for his creations, like better handmill, a better oven, bigger cooking place etc, but later finer flour and other ingredients will be needed, bigger kettle, bigger stove, and even better equipment, this can’t be crafted only by a mason, blacksmith for pans and pots made out of metal, dried spices harvested and prepared by the herbalists, fermenting barrels made by the carpenter, for the finer flour a better mill is needed which could be created by coorporating mason, engineer and maybe trapper (imagine a water/windmill or a squirrel in a treadmill)
You’ll get a lot of small steps, lot of functional furniture and possibly more living animations (hearthlings could walk to each other if they got plans for new furniture/items)
Maybe a billboard à la Witcher 3, where hearthlings pinup their ideas and needs, hearthlings could read it when bored or if a request for their job is pinned on it. Would be also an immersive way to implement more feature/information without cluttering the Gui.