One major problem with getting players interested in XIV is the method of Ranking up. Quite frankly when most people think "Fantasy and Adventure" they don't think "Running in circles for hours killing birds, rats and goats." More then a few major game reviewers noted that when you get past the bugs or the UI or the lag, the bare bones of the game, grinding hour after hour off random animals was just plain boring.
My solution I believe would be easy enough to incorporate because the same people responsible for the original idea are with the XIV development team. Bring to XIV a new and improved vision of campaign battle! Here me out in more detail.
Players could easily and quickly band together to fight off overwhelming odds. Anyone can get in on the action on their own but at the same time the difficulty encourages team work and grouping. Something this game is still lacking.
Crafters won't have to be left out either. In battles they could syth items requested by NPC's or could be given the ability to buff or debuff allies and enemies. For example armorer's could raise nearby players defense and HP. Alchemist's could pass out temp items to other players to boost stats. Goldsmiths and others could multiply the effects of gear associated with their craft. Or various crafters could work together to build belfries or repair buildings in the mist of the battlefield.
I know SE is planing some sort of PvE mass player content but I hope they use this to diversify how players can skill up. Which brings me to my most important point, do NOT restrict this content to high level players only. It would only doom potential subscriptions I believe if such intense and engaging content is out of their reach within the first month. This event should be seen as a viable way to grind to the cap when your out of leve's and bored sick of killing docile animals solo. Not just something for the minority of gamers who bothered to stick with the game till the end with something to do. There can be an aspect to it for endgamers like exclusive high level area's just to challenge them.
I believe if they could create an exciting group friendly yet soloable skill grinding like this, it would go a long way to bringing new players in.