IT IS TIME, BROTHERS.
Q1) Are the deep dives locked to ONLY promoted classes or is it a minimum requirement to have at least one class promoted?
[Reasoning: This would lock people from playing certain classes which would be irritating]
Q2) Do all players need to meet this requirement to start a Deep Dive mission (similar to how the Tutorial terminal is locked in public lobbies) or is the host's status the determining factor?
[Reasoning: None of my friends have promoted any of their characters and I'm the only one with promotions]
Q3) Do you really think you can stop us from creating interdimensional rifts with our beards?
[Reasoning: Let's be honest, haunted caves are the LEAST of our worries]
All answers I give here are based on what currently is the plan and might change at a later point. But as of now:
A1) Only Promoted dwarves can go on Deep Dives. If your Engineer is Promoted and your Scout is not, you need to be on your Engineer to join a Deep Dive, or go level your Scout instead.
A2) All team members need to be on a Promoted dwarf. Only Promoted dwarves can go on Deep Dives and a Deep Dive will only be allowed to start once all team members are on a Promoted dwarf.
A3) No. We do not. And we live in fear.