Serious problems with the Duty Finder

[Nicobo]

...and they just need to make join in progress mandatory....

This is not an appropriate solution,
1. GC hunting logs require to kill mobs at the beginning of dungeons
2. for consistency, main story dungeon will be same, so when some people very concern first timers must watch CS, so...
3. same as 2, first timers for any dungon would skip the first part.

I think you may suggest auto member reinforcement but not forcc ppl to join in progress.
A lot of join in progress are dead game, have you tried join a content with only one AFK player inside, quit and then rejoin to that content again?
Make join in progress mandatory will make ppl keep joining to that dead content. ^^;