I think everyone is reading too much into Rukkirii's post.

Re-using assets, framing foundations of old buildings in ruins...re-using trees, landscape pieces...removing redundancy...making locations more meaningful.

It's not a here's a blank slate let's remake it...it's a we have assets we've created how do we best use it and expand and creating a more dynamic and amazing city. We've seen the sketches...I'm hoping Gridania gets carved into an old growth forest feel...and the city spirals up roots into giant tree canopies on top...it's a shame to have a wooded city only be on one level.