This is a great improvement. Should definitely help with sites like TechCrunch where they litter their articles with about 5,000 links to previous articles they've written.
True enough but for some reason a superscript is less distracting to me than a blue link. It's almost a compulsion for me to hover over each inline link to see where it goes. Hopefully this cuts down on that.
I just mean footnotes in general. If I see [x] after a phrase, I instinctively feel the need to look up the footnote and find out what the author wanted to say or reference there. Adding footnote links that aren't actually footnotes would drive me crazy.