In both the classic builder and 2.0 builder, by default there is no space between bullet items. This is a pet peeve of mine. Whereas ordinarily paragraphs have some vertical breathing room between them, with lists, all the items are shoved together.
This makes a format that is supposed to increase comprehensibility by separating out ideas reduce the potential effectiveness by shoving them together.
With the classic builder, I figured out an easy work-around, since it allows access to the HTML code. See below for example. Simply update the HTML to add the 'style="margin-bottom: 10px"' to each list item (change the 10 px to however many pixels you want to have more or less space between items).
<ul>
<li style="margin-bottom: 10px;">Item 1</li>
<li style="margin-bottom: 10px;">Item 2</li>
<li style="margin-bottom: 10px;">Item 3</li>
<li style="margin-bottom: 10px;">Item 4</li>
<li style="margin-bottom: 10px;">Item 5</li>
</ul>
With builder 2.0, I haven't found any workarounds yet to choose the amount of space between items. Maybe someone else knows a way?
I did figure out that if you hit enter after the bullet enough times to generate an entirely new paragraph and then hit backspace, it leaves some space between the items. It seems like a bit too much space, making the items look more disconnected than is ideal, but it's better than the vertical squeeze that's the default.