It is hard to set aside the fact that Comcast isn't particularly liked. It is a 52 year old company with $65 billion in revenue and 136,000 employees. Saying it has a "startup feel" seems pretty disingenuous. The rest of the post reads like buzzword bingo.
Unfortunately mandrill does not provide the same type of customizable routing that Mailgun does. Specifically, the ability to set up a forwarding route so that Mailgun handles all of the forwarding is the reason we selected them. To date I have yet to find another email provider that does this and provides API access and multi-domains support.