I doubt "Extreme" cold is going to be much of an issue unless you are doing McKinley or something of that nature. It is already rated for 20 below temps. You lose a deploy or two. That isn't really the worry.
The pack itself will probably get some refinements. This is a product that BD has had their athletes using for over 3 years now, so I would think it is getting fairly dialed.
It is not going to be easy to get one next season anyway. The production is supposed to be something like 1000 units for all of their retailers globally. I wasn't even thinking about looking at getting one until 15/16 season. By then I would imagine the battery size and weight will have shrunk. That would be worth the weight alone.