The new dashboard is fine, the new hero picker is incredibly bad. It's inefficient and has made your teammates icons very, very small. It makes the hero icons less prominent as well. Valve seems to be using artists who think that the point of this screen is to showcase design and not to pick a team.
It's really, really bad for rd, where you have such a short amount of time to choose anyway. Seriously, whoever designed the menu must have never played dota 2.
To boot, their redesign doesn't even show you what choices the other players on your team have in sd nor does it implement switch. Overall, a complete waste of an update. They changed things for the worse and didn't add essential features to the game.