He's still locked up for me and I have the trophy for all cards. I stopped receiving new cards from wins in all areas once I'd already got the randomly assigned ones for each region. I do want his cards if he has some and I want the new DLC cards.
Work around for NPCs not talking, this sometimes works: Face person, save game, load game, hopefully you see the X to interact.
Unfortuntely, I have tried all manner of reloading and meditating. Since the quest itself has been bugged for weeks, I am pretty sure that my save file is now just useless and I would have to start the entire game over. And I have played for about 40 hours by this point.