Queueing up solo for a Dungeon as a DPS will always be a problem, since there will always be more DPS then there are Tanks and Healers. Especially when it comes the older content. The 2 Main Story Dungeons in particular don’t give any special rewards, next to the (bonus) Tomestones at the end.

If you’ve never done those dungeons before and you wish to immerse yourself in the story of it, then you might find yourself ending up in a group that wants to rush to the end, skipping all the cutscenes and telling you that you should watch the cutscenes at the inn in your own time.

Unfortunately, this is a reality that SE can’t solve by just increasing the EXP rewards, since most of the people in those dungeons have already reached the EXP cap. There is no benefit in there for them.

As a few others have already mentioned, your best bet would be to create a party in the party finder specifically saying that you want to watch the cutscenes and that new players are welcome. Next to that, ask people from the FC if they would like to help out.

This is my main priority as a member/officer of an FC. If people in my FC want to queue up for one of the Main Story Quest dungeons or need dungeons/trials from the Relic Reborn quests, they can always ask for my help. Otherwise they might just be wasting time waiting for the queue to pop.

The things is, we can’t force people to help out. It’s a choice they need to make for themselves. SE tried to solve that by adding the Roulette Dungeons (with the Tomestone and Gil bonus you get after finishing the dungeon) as well as giving an additional Tomestone bonus if the group has at least 1 player that hasn’t cleared the content before.

The next step to improve queue times should not be solved by adding more rewards for people helping out, but more in a sense that you can use different means like lowering the amount of people you need for a dungeon, or filling up the open slots with NPC’s/Companions. They should not do that for every dungeon though. Just the ones that really need it, in this case for the ones used in the older Main Story content.