There are a multitude of key points that people seem to fail to grasp.
- The in-progress parties that have lost a member should be top priority in the queue.
- One of the reasons that parties lose members is because they are failing to progress in the duty at a reasonable pace.
- The long queues exist only because there is a disproportionate number of DPS compared to tanks and healers. This is the root cause of these problems, and it is created by the DPS themselves. We can't address this issue, obviously, but people need to be aware that this is very much a player-community-caused problem.
Forcing players to join blindly in-progress or from the start will disincentivize players from using the duty finder at all. It's risky enough to use the duty finder and landing in a bad alliance that has at least progressed halfway or more; it's even worse to risk the chance of joining a bad alliance that has to start from the beginning. Given time, players in desired roles will opt out altogether and use the Party Finder.
The idea that we can control people's selfish behavior is misguided. Placing greater penalties on them will just cause them to use alternative methods or to simply leave altogether.
You want players to be encouraged to join because of the incentive of not having to run the first parts of the dungeon.
Thank you for the voice of reason.