Anomalies

I'm a big fan of anomalies but there wasn't enough variety for me. I opened up the Anomalies.xml file with the intent of adding some more and I found the Monster and Freeship anomalies at the top. Apparently they've been disabled. Can anyone tell me why? Is there any way to get them re-enabled? Additionally, I think it would be a cool feature if anomalies could provide multiple options like events. Then I'd really be able to have some fun modding.