I really like the idea!
If both were possible (module cluster/rump customs, with e. g. only 5-10 modules for a coaching custom, but still open what will be coached, and fullblown customs for one specific purpose) it could be inspiration for everyone.
To be openly visible complete customs probably need rather strict rules (every hard rule, but also everything that is suggested like max. 3 SPS modules, max. 2 core/1 core 4 St., etc.), but with name, description, maybe title pic?, density/difficulty, free form for reasoning, star rating and the possibility to customize for individual use, this would be a lot of fun.
Edit: Thinking about it, for inspiration and as guide for new users, clusters and their derivates are probably even more important.
E. g. comedy:
Tale of the Dragon+Focus: Song of Joy (comedy)
TotD+F:SoJ+Renaissance Man: Ultimate Writer X (comedy writer)
TotD+F:SoJ+Daredevil Core (stand-up comedy)
TotD+F:SoJ+DDC+RM:UWX (stand-up comedian writing own stuff)
…