It is difficult to believe that this game was in development for as long as it was and it is missing some of the most basic features that your average joe might suggest. It almost seems like this games features were conceived with really minimal effort.
Alongside a mass craft option should also be a mass disassemble option (beyond disassembly of a single type of stackable item which is actually available, thank God). A single click (hold to use) button should be available on the junk tab and in other sections of the backpack, allow also for a selection mode with disassemble option for selected items only. This kind of negates the scrapper perk but what I would suggest there is to make the scrapper perk increase the amount of components received when junk is auto-dismantled. Also, jewelry items that sell at $750 should be rare or epic (they could have tiers of jewelry like gold vs silver, diamonds vs jewels), giving blue and purple components to offset the loss in eddies from disassembling those pricey items. They could have even setup jeweler related heists with legendary tier jewelry which can be dismantled for some pricey and much needed components, meaning some of those "closed" shops with OPEN signs might be your local jeweler and could now be accessible, allow for robbery, etc.
Lastly, kind of a tangent but item related... why is unique loot information stored in the damned save file?! This data should be in a separate file tied to the particular save game which gets updated as unique loot is both created and destroyed (non-consumables/stackables). The file size could be much greater than this save game 8MB limitation. The only reason I can think for not having something like this is due to incompatibility maybe with PS4/XBox.