There is very little PvE at the moment because this server seems to prefer working older content such as lk or firelands over the mists of pandaria content which is far more important
To be honest, i'd prefer to have other MoP content working before Pet Battles, such as more level 90 PvE content seeing as the PvP is doing quite well
Edit: but that's just my opinion, and also i don't think i've read about any progress for Pet Battles sorry
x25 is a nice rate, and hopefully the realm could be added before summer, and also, if this realm is added, i'm sure that the player base on other realms will be reduced by a bit so would the stability of the servers be improved or?
You won't get them back, and i don't think they want to fix it because atm they sell the Sky golem which is made with http://en.db.pandawow.me?item=100910 but for http://www.db.pandawow.me?item=100865 i don't know