Make Choices Matter
You can joke all you want about how the only thing differentiating the endings of Mass Effect 3 were three-color palette swaps, but there is no denying that the series as a whole valued the choices its players made. In Mass Effect Andromeda, choice is entirely absent.
Paragon and Renegade options vanished, eliminating scenes where you could take the superheroic dialogue option, interrupt a character, or toss them out a window if they pissed you off. The dialogue trees in Mass Effect Andromeda were still present, but only served as info dumps or slightly different dialogue options that lead you to the same place.
No matter what you do in the fourth Mass Effect game, Ryder’s personality is always the same and the story always ends up at the same conclusion. Bringing choice back into the fray in the next series is vital to getting fans back on board with the series.