Hmm, it's a tough one. I suppose one of the other markets could be other Aussies that jump the ditch into Queenstown or something. Have you thought about giving a copy of the Queenstown area to someone like musicalaviator on Youtube? He pulls a few thousand views on his videos of mostly Aus, NZ online flying.
Can you sell the areas separately? If I just wanted the Wellington area then I probably would hold off a purchase that's more expensive that comes with lots of stuff I don't want.
The "subscription" name might put some off as well. These days with Office 365 and the like, subscriptoipn means your get it for a year and then you have to keep paying for it if you want to keep it. I'm sure you wouldn't mind this
but it could be hindering it.
Not sure of what others think. I do really want to see you survive though.