Hit the nail on the head, I'd say. Some future competitive game that endeavors to weigh in an evaluation of personal contribution over just the binary win/loss condition and that implements ways to automatically mitigate the negatives enumerated for long duration matches is going to start off in a really good place.
Handling those issues honestly seems like Step 1 in tackling the kind of negativity that is notorious for cropping up in these sorts of games. If everyone's having a better time and doesn't feel punished for things outside of their control, it seems reasonable to assume that the baseline behavior will be a lot more chill.