They say they look at websites like Reddit, anywhere people can vote on (up-vote) heroes they want.
And now they're going over the design cycle it takes for them to make a hero. They talk about the importance of silhouette in hero design. How Heroes need to clearly standout from one another. Now they're talking about Lunara and how her design harkens back to the original concepts for Dryads from Warcraft 3 that they couldn't implement.
Lunara doesn't walk, doesn't mount, she SPROINKS. More mobile, more agile. Great for dodging skill shots but her disadvantage is movement speed across larger maps.