"This is why most of us will choose an 'item' from the plethora of issues, that we can identify with (be it sovereignty, immigration, economy, et al) and base our own vote on that one thing."
I agree - that's what happens in these situations. It also happens in General elections. Nobody, not even politicians, can hope to have a grasp of all the implications of leaving or staying.
It's the reason why, as polling day looms, the scare-mongering will increase in intensity. Our doubts and fears will be preyed on by those on both sides of the divide.