That is some bonkers density for an area with rapid transit (very infrequent, low capacity rapid transit) a kilometer away at the closest point. Baseline BRT will help, but still not the capacity needed for something of this magnitude.
I also wish they had more variety. A few 30 to 40 floor towers could make it possible to add a lower density townhouse corner for families.
Overall, they don't seem to have designated this as an urban island, but more of a towers in a park on steroids. Hopefully they'll have a good amount of retail in order to make it possible to get all essentials within the community.