So Lightning is going to confront Snow, but can't get through the door. What to do, what to do. Lightning then has an idea: Use the necklace that Snow gave Serah all those years ago to open the door. All along that necklace has been a symbol of Snow's love for Serah, so Lightning surmises that if Snow is truly "salvageable", the pendant will open the door where nothing else will. This is easy symbolism to understand and only needs to be acknowledged with a few words. "So, you still do love her" and a smirk from Snow would have been sufficient if they honestly felt the need to explain it. Any one who paid the slightest bit of attention during the past two games would have been able to figure it out. But what does the game do anyway? Have Lightning monologue to herself about what it all means, and then they have Snow comment on it for a bit. Every last detail is explained. So what could have been a clever little bit of symbolism now comes across as "hey, dumb shit. This is what this obvious symbolism means".
Same thing with the little girl who lost her doll in Luxerion. Rather than letting us infer the very obvious reason why Lightning would connect with the little girl, we get yet another monologue from Lightning "she hopes to see her mother, despite all the odds, just as I hope to see Serah".
Lightning's XIII arc is redone, only now at the very end, it is spelled out as much as possible. "Lumina is Claire Farron. She represents the weakness (not sure if I agree with this sentiment that emotions = weakness, but whatever) in Lightning. She is what Lightning has been trying to suppress all this time. If she can't accept it, she will never be whole again". Except rather than letting the player come to some conclusions, it's spelled out so much that, again, it's like the writers are saying "Didn't get it the first time in XIII? Fine, let us spell it out for you".
The game is full of this kind of stuff and it says a lot about what the writers thought of the audience. Rather than trust their audience to get the most obvious connections, they have Lightning or someone monologue extensively about it.