Story size

Hi,

When you start a new storyline 360 project the story size is automatically put to 720x540 (4:3). When we used S2 we changed the story size to custom 853x480 as recommended by other colleagues so it would fit most screens laptop/normal monitors/mobiles and tablets. But with 360 in the responsive preview feature you can now see what it will look like on the different screens and I cannot see the differences/issue. And with the modern player it also seems to be unnecessary to do anything about the story size. But what are your experiences with the story size. Should it be changed to our custom size, can we change to just 16:9 built-in or?