Lightroom CC (6) will be adding haze removal tool soon: https://www.youtube.com/watch?v=HIJYL_AmqX0&feature=youtu.be Terry White has posted this sneak peak video.
Stuart, I saw this earlier today. Pretty impressive. It will probably more than likely be only for CC subscribers though.
You maybe correct about only for CC getting this update. Some in other forums have stated only CC would get the update, however I don’t think anyone really knows until the update it released. I Have the CC version so I guess I will find out soon.