My issue is straw, seeds and stone. Once you have a tree farm going, each tree dropping two seeds creates a positive feedback loop. Once your industry is all running and feeding folks, there's a need to build storage for those three items...I literally have a field of general storage for them to keep pace with demand for the items that are needed (metal, cereal seeds, etc)
Perhaps allowing the recycling machine to simply destroy base items would be a huge help...instead of spitting them back out. (which it will do in a pile on one item high until a new item is placed in...then the tower extends to its full height :P)
Or chest upgrades (void, constrain, etc)