I was thinking of this project today. While I'm not crazy about twin buildings since they can be a bit boring sometimes, both in design and because they're duplicates, planners can do things to make them appear more interesting.
Rather than have two or three towers that are blocky and rigid and that don't really relate to each other besides being twins, they could have them play off each other. I've always been a fan of twin buildings that face away from each other. Doing that, you can look at one of the buildings from a certain angle, and see its twin's other side. It's almost like seeing two sides of the same building at the same time.
An example of this are the Shoreline Plaza
towers in Corpus Christi. They're not exact twins either, but they're close enough. What really makes them interesting is how they're facing away from each other.
I've always loved those buildings mostly for their interaction with each other and also the way they anchor the skyline near the water. It's unlikely that they could join two towers at the Green site without closing one of the streets, but they could at least have them play off each other similar to how these two buildings do. The Green site is also roughly in the center of downtown near the water, so it could be a good focal point on the skyline.