fair warning, pretty major spoilers concerning the endings of these dramas, so if you want to watch them and don't want the plotlines/ twists/ endings spoiled I'd advise against reading these lol.
2. The Atypical Family - I thought it was horrible that they went through all of that self healing/ relationship repair between father and daughter, just for her to still grow up without her dad in her life the minute they repair their relationship. Because "oh, he dies in a fire, caused by his sister's lousy ex" AND then the kicker is "oh surprise, surprise, he's not dead, because his son (which we didn't see any real precurser of him having???? like idk when it happened fr) has the power to bring things back from the past so he's alive (again?) to raise this newborn/ four year old or wtv" and his daughter grew up unloved for thirteen years thinking she was the cause of her dad's depression and her mother's death, and then when her dad and her finally started patching their relationship— oops psych! she still doesn't have her farther's love for the remainder of her childhood/ teen years.
So yeah, I would've brought him back sooner, maybe explain where his son literally spawned from, and probs cut the fire accident out completely and have his mother's prophecy be able to be altered or wtv... like idk give a happy ending where he raises his daughter with a healed/ heathy new relationship and then through the timeskip show his new born he shares with his new wife or smt.
3. Moorim School - at the end we found out that the key that people were literally MURDERED over was a literal useless rock. like no joke, a rock. I would've just actually made the key thing or wtv an actual magic amulet worth (a villain) murdering families and friends over at least.