So here's what I would like: Be able to make any block be able to be anything else but look like the block that was used to do so For exp: Type a command for exp /hd set take out item u want to hide in block (can be a pressure plate, a switch, soul stone, ext) then right click it on a block you want to hide it in. So if you put a pressure plate in that block, now if u step on it, it acts as a pressure plate. If you put a swtich, right clicking the block with trigger it as a switch. Soul stone on a normal block will make u slow. Pretty self explanatory from here.. Don't know how hard this would be to make but I can see it being a challenge! :3
I think it should be possible, if someone wants to code it. Imagine it working the same as the x-ray blocking plugins. specifically obfuscator. which makes ore blocks that are not exposed to air show up client side as regular blocks (stone etc) same thing, but instead you would be telling the server hey make block x look like block y at specific locations. Pressure plates would need to look like air since they are passible.