The main issue is the staff recommendations are a small set of series. It's basically a single list, which rotates occasionally, but that's it.
Community lists can be much longer, can be focused on certain genres or ideas, etc. They exist right now, as Trodsen helpfully points out:
... But they can't be shared or discovered except externally. MVP would be a public "list of Lists" somewhere on the site, but preferably it would be sorted by follows on that list.
Lists are pretty much half-implemented. At some point, they might as well not exist because if you need an external tool to find them, you might as well put the list on that external tool, too. Why share a List when you could share a list of links, unless the List can be found from within the website?