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

[lolicon09]

Anything past Brayflox should require a job stone to queue in Duty Finder. The quest lines surrounding that and building up to Titan should include the Company of Heroes requiring the player to go get their stone as part of their tests.

This would be pretty nice. Actually, having a Soul Crystal should be a requirement to unlock the quest The Things We Do for Cheese. That would be the easiest way to force people to go and do their class quests. they could also add some dialogs if a player don't have one, like:

"Ok bitch, i'll be honest, as far i see, you don't look like a capable someone to me so... come back when you have learned actually useful stuff".

Followed by a system message like:

"in order to take the Main Scenario Quest The Things We Do for Cheese, you must first fullfill the following requirements:
- Be at level 32
- Have finished your level 30 class quest
- Have a Soul Crystal equiped
"

Something that i think it could help would be making every single gear piece past a certain level (maybe 50, since it's when gear takes the Fending, Healing, Striking, Maimming, Scouting, Aiming, Casting route) to be usable only for jobs; not just AF gear and Relic weapons, but everything. This way people will be forced to have a Soul Crystal equiped if they want to enter to any Duty past that level, since they won't be able to raise their ilvl (and all duties have an ilvl requirement now, which is nice).