"A Very Glee Christmas" was, in fact, just that.
It didn't redefine the Christmas TV special. It didn't revive the Andy Williams or other 1970s-era Christmas specials.
It wasn't even original.
But it was typical "Glee." And it was very good.
Sue Sylvester returned as the perfect Grinch, right down to the green face paint. (And her naive sidekick, Becky, made a perfect "rein-dog.") A large part of episode was spent re-telling the Dr. Seuss Christmas classic. But it did so as good as — or even better than — the original.