[Hyrneson]

Although it might be considered as padding by some, one thing that I think could be added to Low-Tech is something that many people overlook as a driving element of low-tech times, architecture. Illustrations with detail and schematics will be needed.
Matt Riggsby did his GURPS architecture, but with some to the sharp minds that SJ has on the hook, that work could be expanded.
As for the arguement that Low Tech shouldn't include Fantasy Tech, please consider that although its basis may come from reality elements, GURPS needs to remain a Universal system and there are going to be people running a variety of games, everything from non-fantasy to high fantasy that need Low-Tech. For the elements that deviate from reality, the good old TLX+Y nomenclature will keep things clear and provide good quality material for a wide variety of players.

RH