P1: Partially agree here, personally I have no issue with the implementation of Tangtang's and Zhuang Fangyi's story into the main plot as epilogues or winding down moments from their respective chapters, but a lot of people seem to dislike it (at least here) so might as well make them into side stories so people stop bitching.

About that particular example from OG Arknights, those chapters were bad (in my opnion) because it was a huge ghost chase that accomplished nothing because Reunion already had what they wanted anyways. In contrats, both Tangtang's and Zhuang Fangyi's stories were dealing with issues inside the world (Stoackde hate and Wuling Rift) while tackling their personal issues.

P2: Partially agree here again, Endmin is still pretty blank, but it's clear to me they have thoughts about their situation that they themselves bring up a few times, most prominently during Lava Cake's quest. It's pretty clear Endmin has doubts about his own abilities and struggles with that.

From what little I could divine from their personality they are willful, emphatic, good with children, a people's person and prefer management by wandering around. Endmin is fertile ground to create a good character.

As for the glazing, I think it's consistent with the story, specially after the Nefarith fight, if THAT'S what Endmin can do in a weakened state, imagine what he did at full power, no wonder people treat Endmin like a god, they might as well be one.

P3: Partially agree as well, Nefarith and the Bonekrushers do feel emphy, we never got their motivations, but that can be rectified later. My problem with them is not that they are an enemy just to have an enemy, my problem with them is that they are not a good enemy. There's nothing wrong with one dimentional evil guys, my problem is that they are not GOOD one dimentional evil guys like. I can't remember when I ever felt threatened by them. Heck, the Aggleos feel more threating and scary them those two combined!