#7 - this has to happen to have a crossing that looks like it is on land but ships can cross it too (if you own korinth you can 'pull' ships across the diolkos)
#5 is a well known bug that's being fixed by animation guys
#3 Getai colors aren't quite the same as KH but they are close. We might try to change up one of them, but no one until now has mentioned that it's been a problem.

The other questions are unit ones that I can't answer.