For the "messy" thing, we are definitely on it and we added the link stuff to the bug list. But this will take time (days probably).
For the set of subcategories that are visible, we had of course to make a choice both for the selection and to organize it. It is here impossible to satisfy everyone, and the choice were mostly driven by the trends of the moment. I am nothing your suggestion and we will discuss it. THanks for the comment (if no one complains, we can't guess :D ).