No one should be allowed to queue without a soul stone if applicable.

[Mansion]

There is a bit of an issue though with the jobs that physically can't remove their job stones at all. That and there is nothing stopping you from being able to remove the stone and que. A "simple" solution would be to make it that all ques require a job stone at 50+. But codingwise that might be easier said than done.

I would prefer to get rid of classes actually, and just have the job soul stones (as they appear in the cutscenes) as trinkets or relics that have no proper gameplay element tied to them. That would be a nice occasion to finally separate SMN from SCH so that both can work in their own way.

Also, if they managed to add to DF "cannot queue as a Limited Job", I don't see why they could not apply "cannot queue as basic class" for dungeons 30 and up.