My only concern, at least from the information I've been able to read from various sources so far, is that the new guy is the author of Apple's programming language Swift. Swift is great for writing Apple apps (apparently). However, being able to write/develop a programming language does not exactly translate into being a expert at writing AI software for autonomous vehicles. While developing Swift speaks of his obvious smarts and programming skills, I would think being very familiar with AI programming, etc., especially for autonomous vehicles might be rather important.
Perhaps he already has done lots of AI work and it's just not well known. My < $.02.