I watched the whole first season of Versailles.....and I didn't love it, but it was fun to see shots of Versailles in the first stages of expansion. The show is a coming of age story about a gigantic hunting palace that will grow to be the behemoth that we know and love.
This garden doesn't hold a candle to the one in Outlander, but it is lovely nonetheless. However, the whole point of the show is to remind you that slaves prune those shrubs, so it feels wrong to appreciate them.
Notice that the garden is only symmetrical in one direction. It so easily could have been "perfect", but is just a little off to keep things interesting.