I had some suspicions (fueled past experience) that it was the fact it was a gamepass variant that was breeding ground for all the issues, thus I decided to get the steam version and lo and behold : works like a charm (not to mention I even added a good amount of mods, compared to the vanilla experience from the gamepass version).
My issue is resolved on a personal basis since I now have a working version of the game (steam) so feel free to flag as resolved, however I am willing to provide what information I have about the issues I had from the gamepass version (I deleted it a while ago though so i'll be working from memory).
It is worth noting that the missing textures were almost everything in the game:
-everywhere like: world map, battles, sieges
-every object: characters, armor, weapons, siege weapons
only thing that seemed to have survived was terrain and some buildings.
As for the crashes, they occurred very randomly and without prompt, the times I remember were alot of mid-battles, as the world map loaded, entering the smithy, while trading and a good portion of the times in tournaments, esp common to happen the instance I did a high damage attack with a polearm (oddly specific, I know) in both tournaments and battles.
Thank you for your time and effort,
cheers.
