About the Japan Expo thing, we just don't know anything about it.
Maybe they asked us to come ? Maybe they are the one who made one of our greatest dream possible ? I see it more like that personnaly.
I really don't see any problem of X Japan performing "at" the Japan Expo. Of course if we need to buy tickets to the expo + X Japan, it'd make no sense. But as long as they are "separated" (no need to buy anything from the expo to see X Japan), I really don't see what is the problem. It'd be just like any festival...
People complain because X Japan don't play in Europe, when they announce a show in Europe, they complain because it's not exactly what they wanted ! Come on ! X Japan NEVER played outside Japan ! They have NO idea of how it will go, neither do we.
The show won't be as big as Tokyo Dome show. They can't afford making a stage just like that for 20'000 people. As Yoshiki said, these two shows are more to "taste" (test) their popularity outside of Japan.
Anyway, I'm really happy about these two shows, and I want to tell it as I feel like I'm reading more people complaining than being happy. So please, to all the one who's happy just say it so I won't feel too much lonley