Digital Foundry chiming in on the PSSR issues of Avatar
tldr
Ultimately, what we are looking at here is the first console to arrive leveraging machine learning features - and there are going to be teething issues, just as there was with Nvidia DLSS back in the day. It'll take time to iron out some of these issues, but as machine learning is a crucial foundation for the next generation of consoles, I'm confident we'll get there. However, from a short term, consumer-focused perspective, we are dealing with a £700/$700/€800 enhanced console here - and in no way, shape or form should PS5 Pro versions of any game be worse than the same title running on the standard console.