Container ships sizes have increased dramatically without any change in number of crew. The ports may have spent billions of dollars to optimise existing infrastructure to enable these very large vessels to enter. The ships may not get any larger but the changes may already have stretched the crew to their limits of adaptability. While the size kept increasing, there has not been any significant change in the number of crew. Almost a similar number of crew have to manage lashings on a vessel that carries 10000 container or 20000 containers. Something will have to be compromised somewhere and this could show up in another 10 or 15 years when the ships get older. 

The just-in-time nature of the container shipping industry has ships optimising to arrive at Suez just before the 2300 LT deadline. That is a time when there is a large number of vessels arriving causing traffic concerns. And then they have the Suez Canal Authority boarding. And then they have to pick up the lineboats. And by the time they think they can catch up sleep, it is time to weigh anchor and embark the pilot.