Trunks Should Have Fought 16
I think the Android Saga is the best Dragon Ball has to offer but really one thing that I kinda wish is that Trunks did more, we all idolized him as kids for how dirty he did Frieza with minimal effort, but as an adult Trunks really doesn't do much of anything for the rest of the saga sans reckon with his daddy issues. Even his fight with Perfect Cell, while a cool moment ultimately was a pointless battle as Cell could have ended him at any point.
16 is the difference-maker in this timeline that makes 17 and 18 less evil than in his own timeline and Trunks abject hatred of the Androids could have been explored if Trunks at some point fought 16, I'm thinking after Piccolo and 17 fight and before Imperfect Cell debuts, this would take some rewrites because post ROSAT-Trunks would have annihilated 16 so it has to be before he started training in there as well, the Kakarot game added scenes with Gohan and 16 that weren't in the source material to make 16's death be the reason Gohan went SS2 be more resonant, it would be cool if Trunks fought 16 was narrowly winning and it was Kid Gohan who stopped the fight feeling a kinship with 16 and recognizing that the Androids aren't the real enemy, something Trunks couldn't see himself. Doubly resonant because Gohan is the reason Trunks hates the Androids so, and now his past self is seemingly absolving his killers, this is the one thing that could get Trunks to temporarily shift his perspective on the Androids.