The only difference between a rendered and a non rendered list is automatic indentation. It is not a big deal considering markdown was made to be comfortably readable as is. As long as links and images are rendered and you keep your formatting simple without fancy stuff from various markdown extensions, it should be ok for anyone.
It still says this in the README yes. But unordered lists should work. I'm still adding things. My view of RSS is somewhat biased because I use newsboat as my RSS reader, which is text only. Feel free to share ideas!