Toyota was actually very
Toyota was actually very transparent about the fuel fill "issue" once it was brought to their attention. They identified the problem and began working to address it right away. "Sending back the bad inventory" isn't how that process works, however. It's taken a little longer than other types of problems to address since it required a complete re-design of the fuel tank which in turn required all new regulatory approvals and safety testing.
As you know, Toyota is extremely rigorous in their testing. What's difficult about the fuel fill problem is that Toyota has not been able to identify what VIN range is affected and from what production time and factory. It presents itself seemingly randomly and is somewhat intermittent for many owners. Effective range is still over 400 miles for most people and while that's not the same as 480 miles, it's hardly something to make a sweeping generalization about a company over.