I vaguely remember hearing something about this “coming soon”, but I happened to be browsing torrents and they’ve released an extended cut of the last episode of Gatchaman Crowds, which ties up all the loose ends.

The episode title is “Embrace”. The rest of the series is still on Crunchyroll, but it doesn’t look like they’ve licensed this, and of course the US box set was released a long time ago, so there’s no alternative to torrenting it.