Indeed Heeeeaaaaaaath is. Though he is 32 years old and has had his share if injuries, Miller is a staple on the Steelers offense, fitting in well with Tod Haley's vision for the offense which relies on quick passes and blocking from bulky tight ends. Though Miller is racking up fewer touchdowns per season than he once did, he is still a reliable force on the field, particularly for third-down conversions. While he isn't getting into the end zone as much as he used to, he is doing his part to get Antonio Brown, Le'Veon Bell, and Martavis Bryant there.
Pete Prisco of CBS called Health Miller the most overrated player on the Pittsburgh Steelers squad nothing, "He had some decent numbers in 2014, but he isn't the same player he was two years ago. Age is catching up to him some."
It is true that Heath is up there in age, and it is true that he is not as flashy as some other tight ends in the league. He is the Mason Jennings of tight ends. A singer-songwriter who does his thing without a lot of flair. People like him, Roethlisberger can trust him. But he isn't coming out onto the field with pyrotechnics, a beadazzled jersey, and his own personal entourage as if he is the Kanye West of tight ends. That is Rob Gronkowski's style. In addition to that sort of panache, he also has the talent to match.
Does it matter that Heath Miller is overrated, or that his productivity isn't what it used to be? No, all that matter is that he is good enough. And, for now he is definitely good enough.