They've spent a lot of effort on improving playback and media discovery, and on the contrary, I've heard a lot of positives.
If there's some specific or large deviation from their mission that you perceive from their re-design, I'd like to hear it. I have a great interest in internet preservation, and even though I'm not associated with IA, I would hope to learn more about how people are using the collected work of organizations of the IA and how to better serve those people.