I never really got into American comics, but I have shelves full of manga/manhwa. There's probably things that can to be cherry-picked from it:
* Improved availability to consume the entire franchise. Even one of the worst of the worst, One Piece, is basically a single straight run of 101 (currently) books which are easily obtainable. If I wanted to read "all of Spider-Man", it's likely hundreds of volumes across dozens of sub-titles, some of which are essentally unobtainable except as expensive collectibles.
* Little to no "Cinematic Universe" stuff; this ties into the above concept; I don't need to follow twelve other series to know about the single story I've become invested in.
* The classic "Weekly Jump" style phone-book magazine format is almost a proto-subscription in terms of risk aversion and explorability. If you know you already like one or two products, you can safely buy the (impossibly cheap) book, which gives you chance to explore the other 18 titles in there.
* Some of the zanier premises that work out. One of my favourites was Eyeshield 21, a 37-volume story which effectively turned high school football into a shonen battle drama. Could that have flown even in the US?