When playing wynncraft quests for the first time reading the dialogue is new, something you haven't heard yet and thus not really an issue, on subesequent playthroughs however the quest dialogue is nothing but a slog to sit through. In the past I've considered the realm of light quests some of the absolute worst due to this, but with adding the swap hands to skip they have become completely bearable. I feel it would add a lot to subsequent playthroughs if you had the ability to skip all quest dialogue with this feature. I don't feel like this would cause any issues with new people not reading dialogue as the people who would skip it weren't going to read it to begin with and just sit through the slog whilst holding shift.
Yap in short, add the cutscene feature to all quest dialogues to skip them.