It's a double edged sword. I wouldn't buy DLC for 2048 at the moment because I've barely touched the game in weeks. And the reason I'm not playing it is because of the lack of replay value i.e. no Racebox and severely limited Online functions.
Make the game whole by including the options that should have been there in the first place. Then I'd start playing again and would probably buy the DLC too. I can imagine many players feel pretty similarly.