Along with the new landing pages they also introduced a new parameter.
USERSELECTEDFUNDINGSOURCE
(Optional) This element could be used to specify the preferred funding option for a guest user. However, the LANDINGPAGE element must also be set to Billing. Otherwise, it is ignored.
- BML – Bill Me Later
- ChinaUnionPay
- CreditCard
- ELV
So keep your current parameters the way they are and add this new parameter to SetExpressCheckout set to CreditCard and you should get the old flow like you're wanting.
You also need to make sure you're using API Version 109.0 or higher because this new parameter was introduced in version 109.0.