TBH, I just don't think something better is possible - I suspect that there are no valid shortcuts to trust.
Unless something is just obviously bullshit, it will always take some time to develop a sense of how the different sources are treating a new story. Even a trusted source can prove unreliable on a particular topic.
It's uncomfortable living with that uncertainty until you've seen a story from enough angles that you can judge for yourself. But either the story is important enough to me to spend that time, or I just accept that I can't really know.