I hesitate to answer this because it's double edged and I personally have a pretty conservative (meaning strict, limited) scope of what I will write or read in canon-setting RPF. There are writers who handle heavier subject matter like internalized homophobia, restrictive dieting, mental health, drug use and so on who exist in fandom already. None of those things are fun to think about or read about, especially when some of us have our own fraught relationships with our bodies so I would never say that people "should" write something. Especially if I myself am not willing to touch on it, but I do think that if you're considering idolverse in any K-RPF setting to consider the BBB-board. (Bleak Boyband Bingo is one of my favorite things anyone has done on this side of the internet - and there are squares relevant to girl groups as well!) https://x.com/bbb_fest/status/1193652264382038016)

On a more lighter note, I once heard about actors apartment swapping while working in location in each other's cities (ATL/LA) and that would be such a fun setup for a The Holiday AU.... but make it idolverse....