I'd like to install and play just the xpac like Infamous Second Light, Horizon Zero Dawn (Frozen), etc. I don't expect or demand anything, for me its just simpler passing on playing the xpac than rebuying a full game just to get to the xpac.
I bought FF7R intergrade (plat'd FF7R at launch) and played just the Yuffie DLC and regretted it, it wasn't worth $70 just to play 6 hours of DLC. I expect something similar will happen with GoT.
To me it feels like I am slightly being punished for playing a game at release, time and time again if I had just waited a few years instead I could have gotten the Ultimate/Directors Cut/GOTY edition that has everything and now the added wrinkle of a PS5 version with full DLC. Yeah, I know this is a thing since console launch so its not a huge surprise and my last few years have actually had me NOT buying games at launch and just waiting and its paid off, but these kind of release decisions reinforce my decision to not buy games at launch anymore, which seems like it should be anti-thetical to publishers.
I was a guy happy to drop $100 for ultimate editions of games pre-release, but I stopped doing that because I felt like I was just being taken advantage of.