Earth stage is terribad on PS2, and promotes camping worse (but I cannot lie, Fire transformation on PS1 is terrible...)
Also, never did I say "oh no, its different, so it's bad", lol. I said I'm not a fan of the control alterations that come with it. Ice= slides, more tripping. Earth= worse camping, imo. Air= change to manuvering and air combat (which I occasionally like, but I find it situational. Can't combo the same way, and it can get you rocked too). Conveyors (love/hate. I like the added flexibility and creative factor they make. I hate them when I want to do things that consistently work, and it just cant due to the stage mechanics.
Edit: I do like fire stage at high %s, tech the hell out of that tree. Saves lives....