Amy was critically panned, and players haven't been shy about sharing their problems with the game. A new patch attempts to assuage those complaints, from fixing the checkpoint system to allowing you to skip story sequences.
The patch notes (via Joystiq) includes revised checkpoints so you don't have to go back to the beginning of a chapter, syringes and Amy's powers remaining available if you restart from a checkpoint, the removal of the Combat camera, the ability to skip "most sequences," and tweaks to the in-game brightness.
The notes claim this makes chapter five much easier, and to be fair it does seem to address some of the most serious gameplay concerns. On the other hand, its reputation had to be hurt by the poor reviews, so this patch may come as too little, too late.