This could be somewhat true, possibly it is best to remove pre-patch mods completely. On the Steam discussion forum a moderator recommended this: Delete the content in the Mod folder, delete Mods.sqlite file one level up, unsubscribe from you mods in the Workshop and verify the game files.
After I did that, I had Sean Bean reading each and every quote... for a while, then he fell silent again. But he did read quite a few; with only my single mod disabled he usually fell silent just after the first quote, after loading a save.
