I'd like to see some "engineering porn" !
Since at least some portion of these peoples lives is about chopping through zombies, you'd think they would spend some effort into developing weapons/machines to make this task less arduous. I know I would :)
For example, in normal melee combat, it's not uncommon for their weapons to get stuck in the zombies and while trying to get it out/off they get attacked by another zombie. Rinse, repeat.
I'd like to see some large-scale engineering to dispose of zombies. I was thrilled to see the zombie-chipper at the scrap yard, but it was too little and too small scale.
They could build like wind powered sound generating things at steep cliffs all over the place where the zombies would just fall to their "death".
But I'm sure something more elaborate could be devised. Put Eugene to work! ;)