I have read the latest interview and Yoshi has failed to address any hints of a war bode system or any alt-friendly options coming in the near future.
I believe most players would like to see a new wardrobe system similar to WoW and GW2.
Secondly, while most players love that we can do all things on one character, but some of us like to rpg, play as different sexes/races, or different servers with friends would love more alt- friendly options such as quest-unlock- sharing, and the ability to trade gil/items between characters on same account. I believe introducing these options will make players want to enjoy FF14 longer, stay subbed longer, and replay the FF14 adventure through different set of eyes.