Although the Jazz music is great, the point is almost moot. During longform as well as during WUTV, all we get is local on the 18 - one LF an hour! Furthermore, you simply can't fit much music, Jazz, production, vocal, whatever, into one minute.
If the 90-second or 2-minute LF were brought back, that would be a much more compelling case for Jazz and/or vocals to return. This seems unlikely though as TWC has to sell commercial space and eliminating LF's has been an effective way to make more advert time available. In fact, I have to believe the only reason they keep that one LF an hour is so they can sell a decorated ad background if needed.
Clearly LF's are on the back burner. The special holiday background LF's are hardly used anymore. With smart cable / satellite boxes and smartphone apps, local weather is always a click away. I would not expect anything magical to happen with our Intellistar LF's.