The enemies were trying to social distance! We actually found a bug where they don't want to get too close, but still chase you. I think it's a > when it should be a < in the code somewhere.
We also didn't want to have all the enemies shooting all the time, and keep it a bit easier. When we first started going it, we couldn't even kill anything, even when rolling the attack dice fast, because they'd just zerg and shoot you so quickly. So some polish and balancing is needed for sure!