Looks interesting and I gave it a whirl-- thank you. Your intro mentions filter + sort, but I couldn't find a way to do that in the web UI (maybe that's just my ineptitude).
Re your question whether it would be useful: hard to answer because I cannot tell right now whether it solves (or intends to solve) any specific problem better than plenty of other alternatives.
Re your question whether it would be useful: hard to answer because I cannot tell right now whether it solves (or intends to solve) any specific problem better than plenty of other alternatives.