@Kerberon
I agree with you in some, but you have seen some of the story mode quests where npcs helping you to do the fight and I think they are doing well!
I mean lower lvl dungeons are even doable with 3 players espcially if yo uhave an ACS/ SUM who can play dps, healer and tank at the same time!
I know SE are using those dungeuns to teach ew players how to play their roles and all, but I think SE can expand their teaching through retainers and chocobo right!