I do not see why I should entrust anybody but the bank with information about my wealth. This will get abused and I will probably get nudged into this, so that the company selling an unrelated product can sell my information.
If you want to do a product using my banking data, then do a product using FinTS (https://en.wikipedia.org/wiki/FinTS) and not as a service that grabs my data to you.
> PISP (Payment Initiation Service Provider) are the service providers initiating a payment on behalf of the user.
No thanks! Direct debit and wire transfer work good enough. This probably will open the door to insecure payments without 2 Factor Authentication.
> For banks, PSD2 poses substantial economical challenges.
They are already under stress to provide low-cost bank accounts with the low interest rates of today.
I am currently with a bank that I can trust (credit union) and I really do not see much of a need to change.