Working with pretty circuit heavy games can take a toll on the limit of custom rooms, even when visitors can't see them. We should be able to pack up circuits into one package. Now, a proposal to how these packages might work. Packages can start with an input chip, with lots of outputs. In the packaged up version of the circuits, the package will have lots of inputs (the same number as the input chip). Those inputs on the package will be what outputs on that package's input chip. Then the package could also have lots of outputs, and inside the package, an output chip, whose inputs will become the package's outputs.
TL,DR: We should be able to package up circuits with inputs and outputs to take up less space in custom rooms. :)