@Rozoro
Well, on the Mass Effect thing ... IMHO the issue was that the devs decided to give people 3 color shades of vanilla ice cream ending ( same stuff, just with a diferent tint ) after letting you decide your fate ( and even your gender ) during the whole series ( not a smart decision, but hey, being a good game dev is hard
) ... not exactly what we get here. In here ( and let me underline that
IMHO ) it is like the mangaka forgot to deliver the last 10 chapters of the story to the printer ... so it is not contradicting the previous story, just ... lacking.