Do finer-grained dependency analysis to infer more general kinds on type/class declarations
In the resolution to #9200 (closed), as detailed here, we identified an area for improvement. This improvement was not implemented in the fix for #9200 (closed). This ticket will track just this improvement.
(In brief: we can do better dependency analysis on mutually recursive type/class declarations to allow more kinds to generalize earlier. This would lessen the burden on programmers to put in kind annotations. See the wiki page.)
A solid but unfinished attempt is here.