Thanks again team for your feedback. Rest assured that we are listening to those wanting a premium ad-free option, and this is under consideration - but we will not be returning to a separate ad-free app in addition to this new app.
While we are government owned, we are not government funded other than for specific sets of services set out in contracts with the Ministry of Transport, DOC, etc. Development and maintenance of all our apps - and much of the underlying information they contain - is paid for through the ability to generate advertising revenue. This works well for us, since it gives us the freedom to develop the best possible experience for our customers and end-users.
I'll keep you updated over time on the road map of new features, including whether we decide to go down the premium ad-free route :)