I can’t open my chests either, but not because of deeds. My reason is having almost every cosmetic and being unwilling to scrap more of my red items.
We may be able to open some chests when this change is implemented.
It kind of depends on how they go about fixing this. If their fix is similar to how they did it with illusions, then duplicates would be impossible and cosmetics won’t take space towards the inventory limit. If the fix only does something about duplicates, then we are out of luck for now.