Problem with Duty forced into Expansion Content...

[Geula]

Not as a melee dps.
Maybe during the first year, but already before Ninja came ingame average queue time for MNK in the chaos server group (europe) was around 15 minutes.

Unless I'm missing something here, the game doesn't care about types of classes, just their role, I can't swear that i've seen a party with 4 dps casters but 2 BLM and 1 SMN I did. In any case, the ARR content isn't played at all it seems, it's a weekend, I've queued at evening for what you see and I'm still where you see.

[Niwashi]

Unless I'm missing something here, the game doesn't care about types of classes, just their role

Sort of. It will try to mix both melee and ranged damage dealers into each party if they're available, but can suspend that rule when it needs to, so will sometimes make a party where all DPS are melee or all are ranged if there simply aren't any of the other available. (For this preference, it's looking at the range of their attacks, so Bards and Machinists get lumped together with casters rather than with the other DoW damage dealers.)

[Felis]

Unless I'm missing something here, the game doesn't care about types of classes, just their role, I can't swear that i've seen a party with 4 dps casters but 2 BLM and 1 SMN I did. In any case, the ARR content isn't played at all it seems, it's a weekend, I've queued at evening for what you see and I'm still where you see.

extreme primals and CT, not neccesary for MSQ and only part of the mentor roulette
for ex primals, try unsynched in the PF

[Sida]

Unless I'm missing something here, the game doesn't care about types of classes, just their role, I can't swear that i've seen a party with 4 dps casters but 2 BLM and 1 SMN I did. In any case, the ARR content isn't played at all it seems, it's a weekend, I've queued at evening for what you see and I'm still where you see.

None of the places you are queuing for are either in main quest, or in roulettes. At the moment people not running crystal towers is widely lamented thing, and most people rather get ex groups from PF than in DF. However either of those have nothing to do with OP s problem which was to get into content required to pass main quest. And that gets ran rather regularly outside of patchweek bubble.