Sorry to hear the 180 update has not worked.
Unfortunately that is the way T.S. is, you could create an excellent scenario with all the AI running perfectly, go to test it and get a derailment or Ai collision within the first 30 seconds. Or even better, do a whole scenario only for it not to load due to the amount of Ai- that’s fun trying to sort that out!
If you are having issues with the ECML merge then drop ATS a support ticket or put a post on the ATS Facebook group (if you are in it). I’m sure someone on there might be able to help you.