At its heart, the FF concept is about exploration. I really liked the term Imaginauts to describe them. Sure they are a family, but that's incidental.
Would an ongoing TV show be a better fit for them? They go on a trip to explore the mysteries of the galaxy, or the microverse, or the Negative Zone, or wherever?
Think Star Trek or Lost in Space, but with the core four. Would that be better and/or get around this Fox thing?
The Netflix-subverse is based on "street-level characters" because they don't have to use a lot of FX to make them work.