We know they aren't coming in EW and races are big selling points for expansions so all signs point to 7.0 release for fem hrothgar. That means we'll see a reveal and concept art around the time of the first fanfest for 7.0. If you're expecting any concept art before their big reveal, you're going to be disappointed.
Actually, its not weird. I can promise you the work load is more than you think it is and staffing is a lot more complicated than you think too. Throwing people at an issue is a good way to make something take longer than you want it to; hiring a lot of people is never a good solution to a problem. Human resources and software development are both complicated problems, especially for a team as large as the one working on FF14. They hire when they need to but its much better for them to move around task schedules; its usually cheaper, faster, and more productive than hiring new people.