It will be a while before this project gets completed so it will weather these uncertain market conditions.
There are new downtown builds that are asking $1,500/sq.ft. or more and they are not very special nor particularly luxurious builds, and their timelines are much faster.
I agree that the rooms in most of these units are very small and the innovative structural system creates massive structural walls and very deep window ledges that eats into the floor area (most of this is cleverly incorporated into built-in window seating). Having a diagonal structural member going through your unit could be a really cool feature to have.
I think you have a decent buy if you don’t mind having your deposit tied up for so many years.
Are you intending on keeping this as your future home?