In 1.3.1 World spawning can occur immeadiately beside a maskling camp - things do not go well for the migrants.
Edit:
- Also Maskling forces seem very large early, the first raid on several new worlds is upwards of 10.
- Storage capacity can still be exceeded
- Masklings sometime get stuck in water? unless they're grouping location is very close to the settlement? either way it casues my settlement to continually be in Alert mode
- Roads dont seem to be constructed until every last thing in the construction queue has been completed