P: Please add advanced keywords - controlled vocabulary

Lightroom CC and Keywords.
It appears that the CC version only has limited support for keywords. For those of us who have spent years collecting or building controlled vocabularies, this would be a critical requirement and is a potential game-changer in respect of migrating to the CC version. Dealing with 10,000 bird species in a variety of languages including scientific binomials ain't going to be fun in a flat keyword list. I recognise that for people who only want 'blue', 'sky', 'holiday' this won't be important, but for digital asset management it is pretty up there.
Support for a continuation of hierarchical controlled vocabularies would be much appreciated.