I realise I'm late to the party, but I think PC already have exceptional packing.

All of my orders have arrived with crumpled butchers paper filling in any space and of late they have been using more, ensuring boxes don't move around.

my only criticism is that the paper is only on one side with the contents directly contacting the bottom of the box and ample space above filled with paper providing a buffer to the upper surface.

I would much prefer to see some packing underneath and some on top.
this has the effect of protecting the contents from sharp protrusions digging through the outside box. scrunched paper will also provide some assistance in resisting the outer box from being crushed. (look up column buckling theory)

A thin layer of bubblewrap is not actually very good protection. it's fine for absorbing broad impacts but will achieve nothing if something sharpish digs into the box. It also doesn't do much to stop boxes from moving around inside the parcel, unless it's filling the entire empty space (just like the butchers paper already does).

BBTS have a very cool bubble wrap that they use as an outer layer that they have gone budget on over time. but they still fill internal spaces with scrunched paper. and some other shops wrap the contents into a bundle and glue the bundle to an extra layer of card at the bottom of the box, not a bad solution but leaves a lot of crushable space.

on the environmental side of things, the paper is a renewable resource, bio-degradable and probably made from partially recycled materials. bubble wrap doesn't go away.

Anyway, that's my 2c, I like what they're doing already but it could use some finessing.