Dungeon reward lists

If your issue is that "all dungeons have upgrade stones as a reward" then perhaps you should be adding them to the reward lists of all other dungeons rather than removing it when other people do add them. It isn't incorrect info so there really is no good reason for removing it.

Also, just because you know something doesn't mean it's obvious to everyone. I'm sure there are many people who are still unaware that literally every single dungeon in the entire game has upgrade stones as a possible reward. People look at a reward list to see what the possible rewards are. If they don't see something listed there then they would have no reason to assume that item drops from there.