At this point, I'm not justifying if Harvey's Island is a failure or not, however it exists.
So far, we may say we have some clear facts (not speculations):
- Another island (not island from mystery tours) exists in the game.
- We have constant access to this island with no extra cost.
- We have strictly limited access, as we may just to be outside and inside of photo studio.
Some of us may remember, in City Folk we had basic set of buildings inside our town, extra ones was accessible via bus. (fact)
New Leaf gave us a special street with extra buildings, some opened already, some requires specific actions to open.
Despite numerous updates so far, we haven't received any extra building to be permanently placed on our island.