Season Quests

"[If] at least one season quests still have to be left on its Generation page" refers to the example you gave, G11S2, since you seem inclined to leave that one in the G11 page. It can also refer to the G14 page, since the S3 and S4 quests are placed on that article. I'm saying there's no point in starting a collection of Season Quests if not all the Season Quests are not going to be on there.

On the matter of switching, it's probably still best to leave the info in as little a number of pages as possible.

There would be little point to this page with little content, that's true. But considering one of the two quests are already on the Sidequests page, why not move the info over there and delete this page? Unlike the other season quests, these ones don't exactly relate to a mainstream story. (I think they do make more sense being "miscellaneous" rather than "NPC" quests, anyways.)

What is a popular conception isn't good at all to base facts on, I can agree with that much - but I think what is popular is something that we should base the organization on (though that can just mean using redirects).