Thanks for the feedback, I'll consider/ fix all of it for the next version!
As for the crystal, there are actually a lot of those hidden all over the map as part of the overall hidden theme I had for the map. The "glass factories" are covers for the crystal mining/ processing operation. The crystals are used as a power source for what I've been calling "doomsday devices" above the final points. The big round objects with crystals sticking out of them.
Gotta lore geek it up with this kind of stuff.