A step backwards, in my opinion. I'm not sure what this system adds that sharing an IBAN doesn't, but then again Tikkie's conquered that market pretty quickly for some reason as well and each bank has had to copy that feature individually.
There are separate sections for "Wero in your bank app" and "Wero in the Wero app", so I assume the Wero wallet won't be mandatory
It would be a pain if your bank wouldn't provide direct Wero integration, though.