Did you read the update? Gjallarhorn is confirmed left behind. They said on stream they're upgrading a few favorites. I don't know why they think the ones being brought forward are considered favorites, as the most used ones (Gjallarhorn and Icebreaker) are being left behind. We know Icebreaker is being left behind because Light Beyond Nemesis (old version) did not have the option to infuse and a version 2.0 was not shown in the blueprints.