I think it's a summary of what the issues are. New Zealand is a single chamber. It's a unicameral Parliament. There is no upper house. There are no states or provinces. There are three official languages, and Parliament must engage in those languages.
I can understand that the vastness does present some challenges about how you put it together. I'm sure that given that the government has made this commitment about it being the last first-past-the-post election, I guess the thought has been given to how you can honour that, but also replace it with a system that will be a vast improvement on what you have at the moment.