Having spent a few days with the PiFold rig several points have risen to the top.

• I only have the one PiZero and it is being used for several projects prototypes. I have not secured it to the wallet in any but the most reversible of methods. It shifts a bit over the course of a day in a pocket. As soon as I have a second PiZero to dedicate I want to solder the power from the battery unity to it and secure it firmly to the wallet. I might also look into soldering in a very low profile USB port or even hardwiring the WIFI USB module to the PiZero
• I would love to have a power switch solution in place as well. This can be done on the Powerboost , so sooner than latter.
• I fixed the placement of the charge port of the Powerboost to be closer to the edge of the wallet so that the opening for a usb cable is much neater than before.
• I found several templates to make your own tyvek wallets online. It might be fun to have a template that is easy to customize.
• PiFM and VLC linkage still needs work. ALso placement of the antenna in the wallet is a must fix. Again having a dedicate PiZero would be a boon.
• I need to close up, or at the very least set off by default, some of the features that come with Pirate/LibraryBox. Droopy and Chat are the two I could see as being not wanted or needed by some. Should be an easy config thing.
• I find I am using it more and more as I work on it...imagine that. Having this on me means I am never far from a stash of music and books and I am able to share with others easily. I am reminded of the first family vacation I included a nas and AP into the must have equipment for the car.
• Kids want a Minecraft server included. Yeah...maybe the Pi version but not the Tekit+++ modpocylapse they think of as a server.
• More Pixies...srsly...no sleep till Debasser. Tangential to this, the idea of a DJ request msg/chat? I am not sure of this one.