The SNP were a single party able to place a manifesto for their view.
The leave campaign includes incredibly right wing, centrists, left wing, socialists, trade unions etc. It's hardly a shock that they would all have conflicting ideas as to the best way to proceed after a brexit.
Why does such an obvious thing need pointing out to people?
Socialists who don't like the EU don't like that it doesn't allow state aid for industry.
The more right wing don't like the universal protections.
Nationalists just don't like Brussels overriding our own parliaments.
Some businessmen think their businesses are held back and they would be able to make better decisions without the EU rules.
It would be down to an elected government to shape our direction after the population vote based on their manifestos.
This is what makes this such a different decision to any I know I've ever had to make in my lifetime.
Every brexit argument is merely sometging that we CAN do outside the EU. It's not what we will do.