What's being requested is variety. Meaningful variety. Not interesting characters being downplayed due to the bloated main cast who have to be tied to absolutely every major storyline. There's a lot of characters in this game that I like and without exception, they're always hidden away in side content or generally just brought out here and there for the occasional token cameo - and that's assuming that the writers even remember that they exist in the first place.

I would have liked something different than another decade of the Scions and every 'new' character that joins them conveniently adapting the exact same set of morals and opinions towards absolutely everything.

G'raha, Krile, Estinien and Alisae are also arguably not really 'new' characters given that they were all present as far back as ARR. I'd also argue that Estinien joining the Scions only served to erode away most of his grit in order to reduce him to comic relief and distance himself from the role of the 'realist' in order to have him sing the exact same song and dance as Alphinaud. What 'conflict' now exists within the group is entirely surface level and far removed from the sort of tension that existed in many of the single player titles. Such as Steiner's dynamic with Zidane, Hope's attitude towards Snow, Gladio's tension with Noctis and so on and so forth.

Just because some people go to a restaurant and order the exact same dish each and every time that does not mean everybody else wishes to do the same thing.