Describe the feature you'd like to have added

The redstone cards are great, the input option with a threshold and the output option with normal, complementary signal and not(+other operands), allow for covering a lot of cases, however in cases where a more complicated logic is required it can get rather messy, since you need a card to output, a middle ground to transfer the signal, and another card to put it back into.

Solution: Add a third mode to the card (call it process/operate/sensor?, or whatever) this mode can get the signals from other channels, apply the logic, and output in another channel rather than the block.

This would allow for a more fine grain and streamlined control of the redstone logic.

Additional information

Also the And(and other operators, could have controllable input numbers, example: a 3-in AND).