Might someone be able to mod in tiles that aren't always "bug attack" locations to progress? Perhaps having some random open areas,
some untouched resources,
perhaps chance cards offering help to wandering survivors, to get more people or perhaps it goes bad?

Every zone is always bugs to fight, or waiting for enemy numbers to change so your able to fight them. Would be nice to not have to constantly have a fight in-front of every move.

Perhaps throw in some odd snippets of lore, perhaps have (quests) like someone trying to locate family members and you learn their story through way points etc, perhaps little reward at end or not.