More powerful redstone.

For a more powerful redstone, there could be amethyst dust, a more powerful yet more expensive redstone alternative, which could be made by putting redstone in a smithing table with an amethyst shard! 

A more powerful dispenser using a crossbow instead of a bow and amethyst dust.

A more powerful piston using a gold bar and amethyst dust.

More powerful repeaters and comparators using amethyst dust and gold bars instead.

And more!