I'd like to see a comparator card that can pull state from a side and sends the resulting redstone level to a defined redstone channel.

For a more complex implementation, you could simulate the full collector by taking in redstone signals from other channels (or a selectable level defined in the configuration page for the card) and applying the comparason/subtraction operation.

I'd kind of like to let the redstone mods handle this kind of thing. You can always put a comparator down and then put the laser in front of it.