Me too! Annoying and no way to Copy Faders to Sends so you can use Prefader Sends as a Cue mix which in fact can be controlled from the Faderport!
Why the Faderport can't control Cue sends is beyond me and why Studio One has no method for Copy Faders to Sends to at least control the Cue Mix the Old School Way....
Not a Logic user but I understand Copy Faders to Sends is available