If they ditched the Number 2 ground at EP and put in a 5-10 story car park, the would resolved a lot of issues. But that will never happen.
Yipe a new car park is the complete opposite of what's required. That area is one of the best public transport serviced hubs in the country. Plus adding hundreds more cars clogging up the streets there on match day, will just piss off many of the local residents, including the small but vocal group looking for any excuse to have events cancelled at EP.
Based off the proposed plan for ‘Eden Park 2.0’ vision, it could be a world class stadium. Catering for sold out events. But also with some good ideas on how to offer a top notch game day atmosphere for teams that might only consisently average crowds of 10,000-20,000 (Blues, Warriors, an Auckland A League team). But's it's just who pays the hundreds of millions to do this major revamp.