Celebrity's web site truly isn't up to date and current for the layout after the scheduled rebuild. If you actually followed the process of trying to book a cabin, and IF you clicked on 2A, it will tell you they are 170 Sq. Ft. with a 42 sq. ft. balcony... but even there the listing is for Deluxe Ocean Views.
They are adding 350 balconies to the ship. The plus on the new balconies will also be that they are being built onto the outside of the ship...so cabin won't be smaller after the rebuild.