Wasn't it a major issue in the independence vote that it wasn't clear/was unlikely that Scotland would be automatically part of the EU (which they wanted) if they vote independent? Assuming a lot of people wouldn't want to take that risk and also assuming that the EU will likely be welcoming if Scotland decided to leave the UK, I can't see that the No vote will increase, but way more likely see a significant decrease, especially considering how clear Scotland's stance was in the EU referendum.