Well the upgrading was working fine, just the Spawners had a bug where they wouldn't spawn any stacks after the first one. I think we fixed that back in Stego patch. It's nice to see the attack on the colonizer actually being useful for once.And I noticed that marauder encampments is now an credible threat instead of the joke they was in vanilla release. They actually spawn new patrols if previous one gets destroyed and become stronger over time