https://dailyhive.com/vancouver/george-massey-tunnel-replacement-bridge-kevin-falcon-bc-liberals
The tunnel would be OK if it had 4 main lanes each way. Plus 2 bus & HOV lanes each way in a 3rd section. Then a 4th section for future light & heavy rail trains.
A 10 lane bridge would be much better, especially if it had a provision for a lower deck. A lower deck would allow for additional bus & HOV lanes, along with a rail corridor to connect Delta with Richmond & Vancouver. Unfortunately, BC maintains a KEEP IT SMALL approach.