@Yggranya Yep, the existing Salon Passes still work, you can still buy S Salon Passes/pay 100SG directly in the Salon, and the Free Salon Passes continue to be distributed.
You need to use one Free Salon Pass for each body-type you want to modify, though (you don't need a salon pass if you are just switching between body-types without making any <SG> changes). Having Premium and using an SG Salon Pass should let you modify each body type with one pass by going in and out of the Salon during the grace period, and I think you can get away with using a single Free Salon Pass if you don't use the discreet modifying option, but I'm not 100% on that one, and it may not yield the best looking results.
Also, just something to keep in mind, face modifying is not discrete, even between PSO2-type and NGS-type faces, so any changes you make to your face will effect ALL face variants.
The only new Pass is the N-Color Change Pass which is the only way to change the colors of the N-type layeredwear (as of right now, they are only available as scratch frequency bonuses in JP, as far as I am aware).