Well, its March 1st

They're still in the process of fixing/adding features to the layout, so I don't think they're close to a system wide rollout yet. It's still set to release in waves (the opt in portion) and you won't be forced to changeover to the new layout for months. Based on how slow the work has been going, it wouldn't surprise me if it took 4-6 months before they change everyone over permanently.
Aw, that's disheartening :( Although I still haven't made my own banner yet lawl.