Really?
I think you will find the No vote more passionate than the yes vote, the latter then could have a problem if it is not passionate enough to get up off its backside to vote.
The public in general will see more evidence of reasons to leave than facts to stay. We know we contribute 8.5 Billion as has now been agreed, we know the eurozone failed Greece and Spain. We know about the massive migration influx. the media bombard us daily with news on ISIS, which will also have a negative affect regardless of its relevance.
But no one is producing hard factual evidence on why to stay in as far has I can see for our contribution, other than we have it good...but how?