The ability to click and drag keywords and their child items would be appreciated.
For example, I just created the keyword "musical instruments" as a child item of "music," and then proceeded to add child items (along with a bunch of synonyms) such as "violin," "guitar" and "cello."
And then I realized, after all that work, that I should have first created a keyword of "stringed instruments" as a child item of "musical instruments," and then added those specific stringed instruments to it.
So a click and drag capability would make it convenient to add "stringed instruments" as a child item of "musical instruments," and then merely click and drag each instrument and their synonyms into it as child items.
One other thing: an autofill capability would be nice -- so that when you enter the first few letters of a keyword in the search panel, the rest of the word is automatically completed.
Thanks,
Robert