I think it might helpful if there was span or line-height, or the ability to target specific words within a text field. For example, let’s say you want to change the color of one word within a tag-line, or change the font-weight of one word within a broader text field:
This is a work around with a nested column, and three cells (6/12, 6/12, and 12/12), but the end result - even with zero margins and padding - leaves more space than I wanted.
Compare that to the spacing in the custom HTML and CSS I wrote.
I hope in the future we can get more control over the design in UI builder.