If it's simply a matter of confirming that people are vaccinated, that can be done much more simply than having to complete a separate application. Surely there's a way whereby we can get the information that someone is or is not vaccinated when a passport is scanned, since we're all getting vaccinated through government programs. Either that, or simply have travellers show us their phones. Our vaccination status and certification shows up on our phone.
The real question is, what's the necessity of the app and all of those additional questions, like what address you're staying at and what port of entry you're coming through. A lot of those things gave people trouble, especially when we got to a point where we were no longer doing any contact tracing. I think that's really where the questions have to be asked. That's where all of the extra time was being taken up, and I think that's the big reason that people were having trouble completing it.