Hello crony,
Sorry to hear that.
But just to clarify: We don’t deliberately “block” any features such as MMC. Our engineers simply haven’t implemented the support for that as we had other topics to cover that more people wanted (such as automation).
The main idea behind Cubasis is to be able to create awesome music on the go. Carrying an external hardware fader control device (e.g. a Mackie Controller) would go against the mobility idea.