They should fix the game before even thinking of releasing DLC.
I bought it this week, and refunded it after an hour.
Performance was a joke, npc's glitching threw wals and many other issues.
Same thing with Crysis Remastered, bought it and refunded it within an hour due to shockingly poor performance and input lag, click to ADS and 2 seconds later it does it.
I think I am going to skip the first month or two of a game after release and wait for the launch bugs to be fixed.