ditto flipp.
It's in there. Just open up one of the compressors and look for a knee swich. I know it's there in Samp 10 Mastering Edition, as I just used it a few weeks ago, so its gotta be in 11 too. The soft knee was the ticket too, on two compression instances- one a straight comp for bottom end and some dynamic control and a second paralleled to bring up detail and presence. Mmmm, tasty. I bought a new copy of Samp Pro X at the end of the year but haven't played much with that yet.