For me it doesn't really matter if the album is sung in english, japanese or a mix of both.
It's important that the songs have the right feel to it, so I can't say yet "I'll love the album no matter what", as I haven't listened to it yet.
I also appreciate the intention of them trying to pave the way for other asian artists, but I don't think that's neccesary, as there are already artists/bands from asia that are doing well in other parts of the world.
But long story short, I don't care if it's in english or japanese. XD