I doubt there will be a new set of Airship Explorations in 3.3. We're talking about brand new maps and they are very hard to design. In dungeons, you direct the players where to go, in maps, the players go where ever they want. A lot more detail needs to go into them. Think of all the nice details on the 3.0 maps, I feel it took a lot of time and effort to get it all right, something which will be very hard to find the time for in the middle of the content rush of the big patches.

I think maybe in 3.5 we'll get a new set or it might just end up waiting until the next expansion.

Also I wouldn't be too worried about FCs selling Hard mode runs. There are a ton of FCs with houses that will be capable of doing Hard mode. And each Airship they have can go on an expedition every 20 minutes. That with the requirement being only 2 members, it won't be that hard to find some people to go on a run I think.