The best way to make AMZ to improve their packing is not just to leave comment, but to request them to compensate until they upgrade their packing.
couple months ago, AMZ US really suck in thier packing, most of my disc case & digibook broken, after few complaint, they still do nothing, then i started to request for replacement, after a while, all my new shipment is in really good condition. AMZ US now really use a bigger box to ship my disc.
AMZ UK now is the worst, i complained few times & even leave comment on the shipment not yet ship out, but yet they still do nothing, steelbook always dented, all blucase broken.
as a buyer, we paid all they charged, so it is thier responsibility to deliver the goods in good condition. you can exercist your right to ask for replacement.
just ask yourself, will u buy it at the 1st place at that $ if u know the case is broken? if yes, ok, if not, ask for replacement.