This project appears poised to create a 21st Century version of Sixth Ave: a few nearly identical monoliths with large plaza spaces and little personality. While this is by no means something to be mourned--as the row of international style buildings on Sixth is far from a blight on the city--it's definitely a major missed opportunity.
Look at the eclectic and forward-thinking architecture going up all along the Highline, the unique spaces being created by Hudson Boulevard, the careful curating of buildings at Hudson Yards and its "iconic" centerpiece; while the emerging Hudson Yards neighborhood doesn't yet exist, it's already obvious that it will have a character different from that of any other part of the city and equally obvious that Manhattan West isn't going to fit into it. This proposal is definitely preferable to a hole in the ground, but, standing as the bridge between Hudson Yards and Penn Station, one would hope that a project of this magnitude would do something to further the emerging aesthetic of the new West Side rather than dampen it with such conservative and muted design.
I think that's why it reminds me so much of that row of buildings on 6th--there's nothing particularly wrong with it but nothing particularly interesting about it, either; it's like the definition of a missed opportunity.