I wish I could create and place an IDCA directly on a layout (rather then inside mixer layer). I prefer IDCA's over DCA's, because your IDCA's actually show the faders moving that are being effected by it. This is much more clear about what its doing... I like to have a master fader outside of the mixer layer box that is always there on the layout and doesn't use up one of the 32 available mixer layer channels. But unfortunately I cannot currently put an IDCA there, only a DCA.
Mixer Model: X32-rack
App Version: latest pro version