Seen it on Gaf:
Microsoft over the coming months will be replacing the entire party/notification/XBL-related UI parts wholesale. They won’t be fixing them like they previously had been telling developers. This is definitely a smart move and the right decision for the console longterm but it will have some fairly significant short-term implications. They likely won’t be finished until well into spring or possibly early summer (update: one of the sources of this story just told me “It may take up to a year” HOLY CRAP). With Titanfall and Destiny around the corner – two games that are built around online play and will require solid party infrastructure for working as a team… the news that the party system won’t be replaced by then is a kick to the gut.
http://doddscientifics.com/2013/12/03/wholesale-changes-coming-to-the-xbox-one-party-system-but-its-going-to-take-a-while/
Read more at that link.
