Goblins spawn rate

I think the spawn rate of the goblins should be greatly lowered. I just finished fighting off two towns and went to go attack the remaining goblins so I could wipe it out and they had already respawned to seven goblins before I could even get there. They’ve respawned to full strength and weapons in under one minute. I think they’re spawn rates should be lowered after they’ve taken heavy casualties in a fight.