There was a great theme going on in the early part of the game before the Obsidia and Jasper Ward songs were changed. The tune that starts at the Opal Ward became darker and heavier the further you progress through Reborn City (Opal -> Obsidia -> Jasper -> Beryl -> Beryl Cemetery). Anyone else notice and miss this? The wards got progressively more depressing, and the music portrayed it. The Opal Ward, which is the least troubled, is merely polluted. Then you reach the Obsidia Ward, which has earthquake and plant damage with many victims, dead or alive. The Opal Ward tune is played on the piano in a more seriously. Next is the Jasper Ward, which is almost completely abandoned due to how horrible the damage is. This is where the music starts getting unpleasantly dark. The same tune, from what I remember, is taken again and gets heavier and more low pitched. After that is the Beryl Ward, and we all know who why it's such a dreary place. The music here is a much heavier version of the same tune, backed up by the playing of an organ. [Now I know that the Beryl Ward music hasn't changed with the updates, but the buildup to this song was part of what made the theme so powerful, IMO at least.] Last off, in very the back of Reborn City, is ultimately the most grim version of the tune that defines Reborn City.
The two new songs for the Obsidia and Jasper Wards also take the beginning tune and change it, but with different tones. They break off from the theme of slow and sad, instead being either quick and sad, or quick and urgent. The consistency of the original set of songs is gone. Now we have many different styles of songs. Each ward has its own separate song, unrelated to one another. There's nothing wrong with this, it's just that the theme from before of each song getting progressively more depressing was artistic and memorable, at least in my opinion. No longer do the songs reflect how each ward you come across is more depressing than the last. That's something I'll miss. Thanks for reading.