Dotted underlined text style
That feature would be the killer-feature! Trust me — it will economy dozens hours of life when designers need to show links with dotted underline (which is often usable thing to hide some tips or to show user that it is clickable, but not redirecting to other url)
You can paste dotted line from Illustrator (at least Mac version XD).
I've added a new feature request for plain underlined text, if anyone wants to upvote that: https://adobexd.uservoice.com/forums/353007/suggestions/13826292-underline-text
Robert H Paige commented
the option to underline text anywhere should be a given. This is a product to make products for the web right? They often do require hyperlinks and how do we know what text is hyperlinked?