The original soundtrack!
No, I'm not saying they should get rid of the new soundtrack, put your pitchforks down~
I'm just saying they should add in the old soundtrack, too. ALL of it! Variety is the spice of life, yes?
PLUS, wouldn't it be cool if in some future expansion, you could teleport/dimension-leap/time-travel to old 1.0 zones?
Like how you use the Cavernous Maws in FFXI to travel back to older versions of the same places! What was that called? Shadowreign or something?
(I guess with the ps3 limitations this probably won't happen, considering how huge the zones were in 1.0. But maybe they could make it work somehow with a bit more instancing and tweaking!)