Fairly sure they are still seperate due to server code and how it handles Markets/sales.

I can't seem to find the link but i belive it was due to the act of going to a ward actually sends you to the corresponding area. Thus the amount of work they would have to put in isn't feasable compared to putting that effort into 2.0 itself.

Its good to remember there are many things they would love to do for us, but just can't due to time/effort/cost compared to just working those systems into 2.0. All in all the Devs for FF14 are much much more open to player ideas then a plethera of other companies. We have that to be thankful for, mostly.