Me too, I'm wondering why they decided to switch immediately. Why not provide user with a toggle to switch between old and new UI, then they can see how the data says
That's worse and confusing for the end user in the long run. It's also difficult and costly to keep two development lines in parallel. And confusing when giving support. My bank still has an old and a new site (or at least design) and that's been going for 5 years. Insane.