Elden Ring made the attribute system work and you have a lot of build variety without a class system, so I don’t really see what is the problem in NRFTW.
The class system is a lot of work to get it right, to allow personalization and build variety. But from the proposed system it feels at a first glance more limited than what is currently implemented.
EDIT (because I saw that people are still reading this): I said the above before reading the link below, I don’t want to do anti-attribute points propaganda. I’d say let them cook, and we can comment when they let us test it.