So, I wanted to talk about something real quick here that I have seen happen a few times... When doing a PUG random dungeon or just a specific dungeon queue with random players, I have learned that the group leader can just disband the group freely with no consequences to themselves as far as I know. Now granted, they only do this after the dungeon is complete but it is still a very selfish move to do because you're forcing everyone else to be on a timer now since that dungeon instance will now be deleted without the group. This is really bad, and honestly I would consider it to be a toxic thing to do as some players might want to stay in that dungeon for a bit longer, maybe even to go back and finish something that the group skipped or miss... Actually, let me paint a picture:
You're a mostly average normal dps player who wants to do the secret bosses in a given dungeon, such as the ones in Unhallowed Grave. So you queue up for DPS for that dungeon in normal because you can't solo it completely on your own (maybe the secret bosses but not the whole dungeon). You wait 30 to 40 minutes perhaps to finally get queued up for it, and the dungeon start. However, you got one or two players who are hard Veterans just doing their Daily Dungeon to get that done ASAP and quickly, so they just book it and start rushing the entire thing, even if you spoke up in the chat. Maybe two out of three of your comrades agree to help ya with the secret bosses, but the 3rd one doesn't care (perhaps have chat muted and hidden) and just rushes it. Since you are FORCED to join events, you cannot do the secret bosses naturally with the dungeon, but that's no big deal. You can do it after the dungeon is completed since this rusher can just leave the group...
So, you do the whole thing really quick with this Veteran player, completely the whole dungeon with ease and got to the end, ready to take the portal back to the beginning to start doing the secret bosses except one problem. That rusher, the guy who has been ignoring you this whole time is the group leader and he disbanded the group, so now you have a time limit. Even if you regroup, the original group for that dungeon's instance has disbanded and thus you can't do it, instead you and the two others has to redo the entire dungeon... But only if they want to. The other two could've just left the dungeon after the disband, not wanting to do the whole thing all over again forcing you to be stuck with reque all over again, starting from scratch.
I know this is just one example, but the idea is that by forcibly disbanding the group, you're forcing everyone else to leave. You aren't allowing them to have the option to explore, do side stuff you skipped, etc and that can be stressful to deal with... Yet there is literally no reason to do such a thing. If you're done, just leave. Why disband? I can understand keeping the option available but it should require a majority vote. Don't force people.
Also, no this didn't happen to me. I can solo dungeons just fine and in some cases, to avoid other players ruining the dungeon or it's quest for me, I will just solo it. However, when I am in the dungeon queue, I see the leader disbanding the group every now and then. Despite it having no consequence on me, it still makes me so very angry and annoyed because what if other players are new to the dungeon for example? Anytime when I see players in the group who said that they're new to the dungeon, and I know this dungeon has secrets... I will offer to help them with the secrets even if I wanted to rush the dungeon's completion. I don't mind spending the extra time to being nice, and if I were too busy to do it myself, I'll explain to them how the secrets are but ask them to let me complete the dungeon first with them and leave, and they can go after the secrets after I left...
But obviously, not every player is going to be like that. The above situation and many more can and probably has happened a few times, yet it can easily be avoided by making disband group be a vote requirement... Which is funny that it isn't because kicking a specific player requires a vote already in this situation, yet disbanding the group does not? I can't even imagine the potential troll behavior that happens because of this from time to time on top of this where someone queues up just to disband the group, forcing everyone out of the dungeon and be unable to queue for a new one for a while... Unless you it does require a vote but only during the Dungeon being Active and not afterwards? If that is case, the vote requirement should stay until everyone left the dungeon instance instead.