That whole conversation about Locke and his last thoughts was fantastic. Terry O'Quinn knocked that one outta the park.
I don't necessarily consider that a bad thing.
If you're having trouble installing through the retail disks, you can always go to Steam itself, download and activate the game from there. In the My Games tab, click on "Activate a product on Steam..." at the bottom left and follow the instructions from thereon.
Strangely enough, when I look at it in the Steam store, I still see both SoC and CS at their daily deal prices. Could be an Australian thing. Whether I get charged at those prices is another question...