Below are some helpful links to presentations for the transportation and public space presentations for the project, things which have needed to be quantified to get to this stage in the project. It also sheds some light on how the MTA/State/Vornado have been thinking about the project.
It's a good preview of the scope of what is to come, and there's a lot of interesting nuggets sprinkled in these.
https://new.mta.info/document/73216
https://new.mta.info/document/73216
The initial planning was also done by FXcollaborative, so we should see development of some of these design concepts now that they've been selected for the project.