The A380 has some disadvantages now:
1. There is not a good model and flight dynamics out yet. I know there is the Robert Versluys version which everybody repaints like a maniac, but it ain't so good.
2. The A380 is so big, that we should create an own class for it. :[
3. If we had it, we would operate it on extra long routes, like 15-18 hours, which is not so popular among current pilots.
I think if you want to fly the A380, then you can download it in any livery for the Robert Versluys model, and fly it anywhere freely.