Fascinating, I wasn't aware of this workflow! The only bummer for me is that I like the workflow that uses Fantastical to parse because it takes natural language input. For example, I can say "Testing today 9pm /home" and it gets the topic, date, time, and list correct (although not the location of the URL, as noted).
I did try your reminder workflow, but it only sort of worked. IT shows the URL in Reminders, but as part of the title, not the URL field. See attachment. So it didn't do what I was expecting, but I have to say that I really appreciate the effort given that I have no idea how to write this kind of thing myself!