I don’t think that I’ll able to point something that isn’t obvious, but here what I thought when tested few maps.
Looks like it’s don’t handle large zones well, sand terrain (when there no town at least) look like actual desert. Also it’s looks like on small maps there usually high-level monsters block passes between different part of same zone, but on larger there just too much of empty space when there not enough zones. So might be you want to separate settings for in-zone guards and guards on zones connections.
While you expose guard strength settings it’s looks like there not yet option to leave banks that have guards on their own unguarded. And IMHO guards still need to be adequate for the reward even if different sectors have different strength scaling.
PS: You can also remove my “fdgdfgdf” crap since I didn’t expect you saving it on server-side when creating it.