Interesting list, but I'm failing to see much of a purpose for this change. It seems like the people on the standards committee are just giving themselves something to do.
The Kanji Kentei organization isn't going to jump to revamp their tests and study materials around this change.
Ordinary Japanese people couldn't care less what kanji are on the joyo kanji list (if they even know what the joyo kanji are at all).
And some of the decisions still seem to be hugely arbitrary. What's the point of adding 阪 to the list, but leaving out its most relevant reading, or likewise for 媛?