When the windmill and mechanical blocks were first announced I was really excited about the possibilities of engineering they might provide. Unfortunately, the implementation was a little lacking in terms of engineering.

It would be great if there was a block we could connect to these that could generate rotational force similar to the old rotor block. Requiring it to be connected to mechanical blocks, and having the force generated be relative to the power provided by the windmill would keep it in theme with the existing blocks and the medieval world but would allow us to build and power lots of possible contraptions.