I see no aggressive roadmap on flux or ravencoin, so I guess developers on those coins are just taking it easy for the long term.
https://github.com/RavenProject/Ravencoin/tree/master/roadmapRavencoin's roadmap is complete. Finished in ~1yr aside from "compatibility mode" which is being reconsidered as the landscape has shifted away from UTXO-based chains (discussed in recent dev meetings). Ravencoin works exactly as was intended from the start and didn't need 6 years to (almost) figure it out.
Currently working on P2SH for assets with a proposal for mineable assets funded and being worked on by at least one developer.