• Craft facade will inheritance block brightness.
• Craft Facade will returns the previous crafted block.
• Facade will translucent when player holding a wrench.
• Use the wrench right click to disguise the side of the block to hide the exposed reader / writer.
  (You can let the exposed redstone reader hide to make it look like a pure redstone system)
• Hidden reader/writer will disabled the right click interaction, as if it does not exist.
• You can use Facade for the container (Variable Store, Proxy etc.).

If there is any hard to achieve / cannot achieve / no meaning, please put forward, I will mark deleted it.

All should be possible. Not that I marked it as feature-long-term though, so no guarantees on whether it will ever get implemented.