The thing is even though that you’ve clicked on Commit, if someone else does not click on Commence before the time runs out or clicks on Decline, you will see the same message that the registration was withdrawn.
The Duty finder queue consists of several phases: Reserving an Instance, Forming a party, finding missing members for the party and confirming/commencing the duty.
From what i’ve seen, it has something to do with when, how and how many people are queuing up for the DF.
When it comes to the “how and how many”, chances are that a premade group would have to wait longer in a queue, then someone who is queuing up Solo. Especially if the one who is queuing up solo, is queuing up with a Job which is classified as “In need”. Next to that, the composition of the group that queued up will also influence the queue time. A group consisting of a Tank and a Healer will most likely have a shorter queue then a group consisting of 2 DPS.
If you queue up Solo, it also matters if you select the Join in Progress or not. If you queue up with the Join in Progress marked, while the one who entered the queue before you did not mark the Join in Progress, you will most likely get a group sooner, since
It all depends on how many people of a certain class are queued up in the Duty Finder. There will always be an excess of DPS in the queue, compared to Tanks and Healers.
Next, you have the “when”, part of the queue. If your party is queuing up for a Duty with group of 2 and the Duty finder is still in the “Forming Party/Reserving Instance” and one of your friends joins the enters queue after your party has entered the queue, there is still the possibility that your friend will be paired/matched with a group which entered the queue before you did, filling up that last spot for their party.
From my experience, i believe that the “average wait time” is based on the class you queued up with as well as the wait time of the previous player(s) with the same class that queued up for the same content. Let’s say, you queue up as a Dragoon and 3 Dragoons who queued up for Frontlines before you managed to get into Frontlines after 10 minutes. I think that your average wait time is based on those 3 dragoons who entered Frontlines before you, not an average wait time for all classes over a timespan a day.
To test it. When you queue up with your friends, ask what their wait times are. You will most likely hear quite a few different numbers.
But, in all fairness, after writing my comments above i would like to quote this from the Live letter as well:
In that comment they said that they are going to further address the Duty Finder after Patch 2.35, so they are aware that changes or tweaks need to be implemented.Originally Posted by Letter From the Producer LIVE Part XVI Q&A Summary (08/11/2014)
In my opinion, i would check if the Duty Finder actually matches together groups that do not follow the predetermined party Composition and forms parties consisting of more then 2 healers and no tanks.
Perhaps people are able to change their jobs when they enter Frontlines?
I don’t play Frontlines, so i have no idea if people can change their jobs during a Frontline Duty…
But, especially the 4 healer party, sounds like a bug and you should keep reporting it with as much Info as possible.