This may be a bit out of left field, but hear me out.
I recently moved for work and instead of splurging for the local cable company that carries TWC, I simply decided to get a streaming service. Since most of them don't carry The Weather Channel, this left me in a bind. But I still have my folks' cable login from home and so was able to get the TWC app for Roku and sign in.
Once there, I was surprised to discover that the TVE-authenticated TWC stream featured a locally-generated (like, by the device) LDL (featuring current conditions, 24 hour and hourly forecasts, 7 day forecast plus sunrise/sunset and moon phase info). Granted, the icons aren't animated nor can it generate an actual local forecast, but it can generate a crawl for an NWS product (I checked, you can change zip codes seemingly at will) and looks damn near exactly like the one seen on air down even to the typeface.
So my question is...if even basic consumer technology (I'm using the Roku built into a 4-year-old Insignia TV) can generate these graphics, why not extend carriage to these streaming services like YouTubeTV or Roku and have the consumer devices that are streaming generate the content? Or even have this technology built into the latest satellite receivers and basically have like a very basic STAR built in that can generate graphics?
I'm sure there are answers to those questions like stability issues, legal issues, hardware issues, etc. but it seems like something that isn't out of the realm of possibility.