Hamlet Defence would be a great addition. Roaming Primals will be nice whenever they feel like getting around to it, I mean it was promised. Also, more world bosses like Odin, I don't know how it is on other servers, but I never see people show up for Odin. I remember the 2.0 trailer showing a gigantic Adamantoise in Central Shroud, only for it to never be implemented.

More world activities like those, perhaps add tome rewards to these, a small amount, nothing that degrades the need for roulettes and dungeons. It just seems like there should be more ways to earn tomes outside of dungeons/raids, something to alleviate the grind.