Ive always hated having to hide restone and making bulky restone chambers when running wires for something, so I think as long as a block is able to have restone run on top of it you could craft it to have redstone run inside of it like a cable with a sheath, of course then it would be hard to idenify where your redstone wire is running, but maybe there could be a subtle way of seeing the redstone blocks from the other blocks
I'm really not posting for mod ideas, I play on multiplayer servers where the only mods are world protection, Econ, and factions. I'm looking for default game changes
Redstone block sheathing