I've wanted to do both these things, and although they are not vital, I expect people would find them useful.
1) I can easily extract all the links, but there doesn't appear to be a way to export the link URLs on their own if the anchor text is not needed.
2) Remove Duplicates Button. This would be particularly useful after I've selected the columns I want, as some entries only become duplicates when unwanted data is removed.
All the best,
Riatsala