I'm for moving the planet
How you do that, I haven't a clue but the planets closer to the sun than Earth are the hottest and the ones farthest away are the coldest. I know that's a very basic look at things but I have this feeling that the single most influential factor in the temperature range of a planet is its proximity to the sun. We need to get the temps on Venus down first before any other step so we can get equipment to the surface that will last longer than a few hours.
Shading's an idea that has some merit but won't whatever shading devices we place between Venus and the Sun have such a large surface area that they'll be giant solar sails? I'd think it'd take a huge amount of energy to keep them in place.
Art