What do you mean by "coming of age"?
Mixing of genres are fine with sub-plots, but the main-plot must be
very clear, and to avoid a flawed story line. Just my $0.02... :)
To me the "Golden Fleece" and "Fool's Triumphant" seems kind of
similar... But I guess we'll have to choose one, and keep the other on
a "lower level" of the story.