The problem is that all items 'inside' a container become fluid.
Exactly, Sami has responded to these suggestions several times. Anything put in container 'becomes a heap of ___'.
That's also the very reason container can only hold one type of "mass/fluid".
If there were little intelligence, doing reverse recipes would work, but as is, each possible content would need its own separate recipe to get out the correct amount for each type. i.e. removing sorrel seeds would need to get them out individually and give each item "created" the correct specs. Same goes for every herb, piece of fat, animal cut, fish... each item would require separate recipe for extraction.
I guess there's going to be blacksmith fine tuning and then other craftsmen/bakers utilizing the fresh code for locating one and placing orders.
There's also marriage, offspring, seasonal village markets and feasts, weather updates, added minor ailments, weapon maintenance, pause/resume any crafting/task, animal husbandry and so on, that I feel might be taking priority over extra layer of storage.