Yes there is, it just requires a generational shift in thinking. The CBD is also a peninsula, road capacity is almost entirely irrelevant.Pyrmont is a peninsula. It is surrounded on three sides by water. This results in limited road access. The roads are already over capacity at times, and there is no cost-effective way to increase that capacity.
My vision for 2050 is to have the heart of the CBD at Darling Harbour with the "old" city to the east and the "new" city to the west/south. Major metro interchange under Pyrmont (Metro West and a future Metro Ryde Rd which wouldn't even touch the current CBD). Expansion of Wentworth Park to act as a green buffer similar to what we have to the east of the CBD. Pedestrian/cycle bridges across the water to improve accessibility. Barangaroo on steroids at White Bay with major educational/cultural anchors to drive visitation.
Pyrmont has a lot of problems and the only way we address them effectively is with BIG, long-term thinking. We need to think bigger than individual precincts or even the "masterplan" that the State is supposedly developing, that's how you secure meaningful green spaces and mass infrastructure that actually makes a difference.