Currently we only have signals with boolean values/shapes/colors. And I can imagine what we can do with these (and maybe what the developers expect us to do): Hard-wire the necessary components every layer(e.g. takes in 4 quadrant to form a complete layer), then add necessary coloring, piling and etc. to automate everything. We can utilize current gates/components to select correct shapes to do this.
But I hope there may be some newer components like storage for shapes, integer processing logic(to be more specific, wires with fixed-length integers and corresponding), counter (for shapes) and RAM/ROM. They can facilitate more complex computing/automation logic, and enable more powerful MaM with even less components.
The current gates are too limited, so sadly many of my interesting ideas cannot be implemented (like making an automation line using the same idea as a simple CPU core). :(