I haven't used Ground News past the free trial, but a decent feature that I liked was simply that you could look into "a story" and get virtually all of the possible news reports about that one story. Just handy, tbh. If there are other free aggregators doing that sort of linking and grouping, I'd be interested.
The thing about "sources" I can understand, but I think they still have their place. For example, I really like Ars Technica as a tech and science source. One of the things that sold me on them was seeing them make predictions based on their "sources" and those predictions coming true (or close enough). When it comes to politics, the same thing applies. Have they established enough credibility to warrant me believing their "sources", at least provisionally?
But if you don't need or want to be on the cutting edge of political conspiring, then waiting for the court filing, full bill, etc. makes complete sense. I just often might need news, anyway, to understand the broader context of a primary source.
I'll have to check those out! Thanks for the rec.