How do you have the player connected to the receiver?
In this particular case, it sounds like it is just the mix. I noticed that on two other Diana Krall SACDs, the surrounds were mixed relatively low, though it sounds just about right to me.
Have you listened to the DVD-A portion of the disc? You have to set your player to read the Audio portion, not the Video portion, to hear the hires DVD-A tracks, and with your equipment, you must also use analog connections to hear DVD-A.