So far as I can tell, there's nothing actively wrong with Sony & Uni's relationship, maybe outside of the obvious cultural rift at the very top of the heirarchy. It's just that outside of Evil Dead 2013, they haven't really worked with each other at all, so it's unknown how well a deal will turn out, especially for a non-promotional house like TLoU (the game is already five years old, Jesus Christ what happened to time) and Until Dawn.
Plus, I'm guessing that video games are an unknown quantity and low on the priority list while big movies and TV series like Stranger Things, Hellraiser, Scream, IT, etc. are still out there.
EDIT: It's the same deal with Paramount pictures; Uni worked with them all the way back in 2010 for Kill Jason, Kill, and there's just not been much of a working relationship since then. Rights tangles with Paramount division Hasbro studios was what ultimately torpedoed the Ouija section of Orlando's HoB.
Like with Sony, there's no active animosity preventing Suspiria, F13, World War Z, or The Ring from coming, it's just that deals are tough to navigate.