The way it's set up now is a total workflow killer. Let's say I've decided to compress the bass group and set the sidechain source as the kick drum. Add the compressor (easy), set up the send (slow because there are SO MANY items in the sends menu), good to go.
But then I realize it might sound better just to sidechain compress one of the layers in my bass group. In S1 this means doing the whole process again, add the compressor (poof!), set up the send (grrr)...now I'm ready to listen. (In PT, Logic, Live, etc all I have to do is move the compressor).
Ok, this sounds good but actually I want to pump one of the other layers in the group, but at a lower ratio. Repeat the process.
I now have two sends on my kick drum just for bass duties...If this is a dance track and I'm doing a lot of pumping this could easily turn into 6 or 8.
It's cumbersome and messy. Studio One is great because Presonus is willing to Think Different about the way things are done, but this is a problem that I see as already having been solved in a far superior way by many other DAWs.