I've been saying this for a while now too. The biggest fault with FF14 is that they've played it too safe. Some of that is understandable, since the original launch was a complete disaster and they want to avoid a repeat of the same mistakes. We're onto our second expansion now, with a third almost certainly on the way, it's a better time than ever to take a couple of risks and see if it pays off. Worst case is they can undo whatever they consider a mistake with an expansion anyway.
I've been wondering about this for a while now too, and came to the conclusion that there's a lot of untapped potential for allowing players to keep up with the gear curve from most content. Offering tomestones for most content is an easy, if dull, way but one that would undoubtably be effective.
Why not also allow players to craft a basic set of gear for themselves that they can continually upgrade through out an expansion? That automatically means crafting is a viable way of keeping your gear up to date too. PvP rewards that are equivelent in power to PvE ones is another option. World events that offer a couple of items each spread throughout the year is an option too. Maybe even have rotating events that tie into the story, such as the Kobolds attacking parts of Limsa to gather crystals to summon Titan or something that both keeps the world feeling alive and offers level appropriate gear to anyone who takes part.
Keeping your gear upto date is more important in FF14 than it is for most other MMO's too. Not only is it required for the latest MSQ content, but that MSQ content is also a requirement to unlock further MSQ content that's added in later. If you're wanting even the most casual of players to keep up and complete the MSQ there needs to be multiple viable options to get the gear you're requiring them to have. As much as people like to argue that gear should be hard to acquire, when the expectation is that the players have it already by the time the next story chapter is released then you need to offer them fast and easy ways to catch up. @
Faroth may think of that as being instant gratification, I think of it as being a practical step to ensure no one gets left behind.