I noticed that immediately as well. I used default standing orders for exploration ships a lot - Divide into single ships, while having survey primary and follow leader secondary orders. So they come in, separate, survey, and form up again on their own. It seems it's not implemented yet in in C# version. I'm not sure I'm using the new OOB mechanics to the fullest though. Need to try having an additional level of fleet command above the separating one.