AMD has to do exactly two things regarding client graphics:
- Developing a good and scalable HW architecture (PPA, features)
- Pushing their software ecosystem, e.g. FSR like Nvidia does DLSS.
- SW is not only gaming focused stuff, can be more than that
The first will be done anyways because of APUs, consoles and a few breadcrumbs from datacenter GPU designs (some commonalities you can re-use for client GFX). The second part ist what is missing. FSR Redstone could have been exactly that but for the time being it is a miserable story, unfortunately...
From that point on the rest are management and business decisions. If AMD wants to build GPU, they have all required building blocks. And this is exactly the reason why the rumored RDNA5 ATx are looking like they do. Use each chip for multiple purposes.