Let me formulate it like this:
While the story of Re: Coded itself might be not overflowing with new twists and "wham"-episodes all along, if you do pay attention to Coded's story and really understand the parts that are not a rethread of KH 1, about half of the "surprises" in Dream Drop Distance won't be "surprises" anymore because with Coded's information you can see them coming from a mile away.
Re: Coded's story does not bring something overwhelmingly new to the table, but it reinforces already introduced concepts and allows to predict where the story will ultimatively lead better.