New missions/TFs/etc. would be nice, but not mandatory; as at least one other person has said, content at different levels would be great
The ability to get Discord to recognize the game and keep recognizing it - I haven't had luck with this so far
Not having to start over with new characters
...but I would be happy with what we already have even if I didn't get the above.
I would also be willing to pay; before NCSoft dissolved Paragon Studios, it was a "shut up and take my money" situation for me. I both subscribed and paid into microtransactions on occasion. I'm not a big fan of microtransactions but I think they're okay for cosmetic items.
ETA: Oh, and I think Titan Weapons for Stalker would be hilarious.
