I think it's cool and bold that he's sharing specific features of Instagram that they plan to preserve. It's bold because it increases the PR cost of changing those plans.
"we're committed to building and growing Instagram independently. Millions of people around the world love the Instagram app and the brand associated with it, and our goal is to help spread this app and brand to even more people"
It used to be a better world when they just tried their best to get acquired without making public claims to the contrary.