first, multiple investment sites picked up the news from regulatory filings that also involved Icahn's share changes. If your news source is someone that simply reads other sites, you are getting your news the wrong way.
second, all of the people that were convinced that Icahn would destroy JBLU won't let go of their narrative but he never had a large enough stake or boardroom presence to effect major change on his own.
third, he is an investor. He will invest his money where he sees the greatest opportunity. Half of the original JBLU investment can make more money elsewhere. He is interested in making money first and foremost.
finally, JBLU is making meaningful changes to management and strategy on its own. He has undoubtedly heard mgmt presentations and cannot do any more and cannot at this point prove that their strategies won't deliver the turnaround the company needs.
JBLU has a very long ways to go for a turnaround but Icahn is not and will not be a significant factor in their decisions. If JBLU demonstrates even a little bit of success, Icahn will make lots of money