Awesome little work in progress. Enjoyed it a lot.
I think you could maybe do with balancing the drop rates for items, or maybe change up the crafting chance.
Since players can spend a couple of years grinding in the first area gathering enough materials for foundation pills your foundation stat can be boosted so much it makes pretty much all the enemies after that kinda trivial to fight against which results in gameplay feeling grindy after that point.
Looking forward to future updates.