Google seems to like DNSSEC, otherwise they wouldn't have implemented it on their resolvers. Also, they have the best platform security team in the world, so who knows better than them?

DNSSEC is great, especially in combination with DANE, PGP, Email and arbitrary Email providers.

You can verify the connection between email servers and encrypt emails safely. DNSSEC seems to not be broken by criminals yet, and that's the most important thing.