I really hope they fix BioShock 2's severe audio problems. Current Bio2 PC suffers from vending machines not speaking, silent Little Sisters (in some versions), and an overall completely fucked sound mix.
It's the last issue that really put me off the game when I tried to play it with my new sound card / headphones a few months ago. It'll be nice if what seemed a basically abandoned port gets a final chance to do right.
Bioshock 2's vending machines not talking isn't a bug IIRC, that happened in the console version aswell.