Making everything available to everyone would ruin the point of playing the game. Iwa is locked because it's a reward to reach it, as is Hoshi. Kumo would be have to be a secret area, or there'd have to be country buffs and the like.
On the other hand, the idea isn't that bad. There should just be at least two unique shops, as most everything looks like a copy of other buildings (Vista = Ocean, Island Getaway = Heidi's Place). I also think that placing the augmented weapon event in a country would detract from its specialness, but if the village itself is hidden, then it'd work.
I would love the rap station, though. <<
