There are a lot of reasons to miss Ralph, but the product on the field isn't one of them. He micromanaged like crazy and was always afraid of giving too much power to the football people. The Kelly years are an anomaly; largely the product of personnel decisions made by Bill Polian.
If you want an owner who understands the importance of a team to a community and who isn't afraid to call out the NFL when it puts larger, more profitable markets at a distinct advantage over others, Ralph's the guy. If you want someone who knows how to put the organization in a position to win, he was a disaster.