I'd say that older idols need better representation. Especially those with history or cultural majors from University. The amount of cultural masterpiece that has referenced, and correctly, history that is core to a nation will always stand to the test of time better than most.
Although AgustD's Daechwita isn't really i'd put something on loop for, but it chronicles a lot of history of himself and ties that in with Korean history to both recall that Korean history and then solidify his own.
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If kpop management of any kind would take a few extra weeks, months, years to actively plan out every single detail to perfection, the quality of the product would be historic.
Some, if not all, things in an MV, lyrics, dance, Idol life, extramusical content (yes, no space), events, TV projects (survival shows, whatnot) have the potential to be record setting. PD101 if they actually took the time to plan out how to naturally pick out an idol group and play ball with the voter results and make it work out the best, the heart wrenching success stories wouldn't have been so cheapened by shitty rigging findings.
also it can lead into my previous point of having absolutely *juicy* cultural, historical, and contemporary references.
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IDOLS 👏 NEED 👏 A 👏 COLLEGE 👏 EDUCATION 👏 PERIOD 👏
even if its a reduced 2 year cram school for just the GE classes, the higher level stuff would mainly instead turn into a level of discipline and underlying academic ability, cognitive training and other things as it were. (its not that idols aren't disciplined, or mentally slow but that shit declines quick without continued training, mental health as it were. Plus the stress levels of college can help desensitize idols to some levels of stress endemic to being a kpop idol)
I hate seeing TV shows absolutely clowning idols for floundering on tasks that a person with a proper work ethic could achieve using existing methodology. I'm not saying that the idols aren't hard working ( they're probably the most hard working of the bunch out of all of us ) but some things I just sigh and look away and wonder why would an idol at his or her age not even know what tf is going on.
Their academic studies could even trickle into being role-models for their fans, and could do "do homework with me" livestreams. Older idols can even hold basic math classes and what not. Younger idols could benefit from having group knowledge at their fingertips by just asking aloud on a vlive and a second member filtering through the answers for him or her. THERE IS SO MUCH POTENTIALLLLL GAAADDD
plus if they took a language elective, intaking international idols would be less of a language challenge. for the korean idols and non korean idols.