Several of the items originally mentioned here are covered by other feature requests already:
- Dotted/dashed lines: https://adobexd.uservoice.com/forums/353007/suggestions/13024749-dotted-and-dashed-line-border-styles
- Accept CSS as input for styling XD elements: https://adobexd.uservoice.com/forums/353007/suggestions/12926715-use-css-to-specify-object-appearance
The only suggestion I think we don’t have listed yet is arrow-head line endings. To keep the request list tidy, I will change the title here so it is specifically focused on that one idea. Please upvote the other links above so your interest in those features is captured too.
Thanks for your feedback!