More rigmarole??!! I haven't done WA, but Tas is already more than the other states. Yes, I just checked - there is MORE stuffing around on-line! Before you just did the details and got a link to QR code sent to you. Maybe having an account means you do it just the once. Or maybe the bureaucrats just wanted more stuffing around.
I came into Hobart yesterday (Saturday). There, when you deplane (onto the tarmac), there will between 350 and 150m walk along the outside of the terminal (some parts even under cover!!). If there is a plane load in front of you, the queue to enter the building may be long. Then queue for a temperature check (2 units) - if you are tall, you'll have to bend down to fit into the scanning area (!), then keep moving, still in a queue, to front one of 6 screening posts, packed tightly (!!) just in the terminal. Brief interview, asked about Victoria, show the QR code and then get bags after the sniffer dogs give you and hand-luggage the once-over. Welcome to Tasmania.