Not sure I agree that it's a 'meh', even if it seems to lack the malty richness I like in the German festbiers.
As it is, it's a decent brew that kind of manages to at least somewhat evoke the German examples.
Truth is, none of the American made ones I've tried in recent years taste as good to me as the German imports. Even the German O-Festbiers that are not of the Maerzen style seem more satisfying than our domestic attempts.
The closest American O-Fest to those German imports was from the unfortunately short lived, but excellent, Red Bank Brewing in NJ (circa early/mid 1990's). Theirs was made from a fairly simple grain bill (using grain that the brewery imported themselves from Germany), and the brew was given the traditionally long lagering period. All of their beers had the most fully authentic German malt character that I've ever encountered in an American made beer. Not sure why the brewery folded...perhaps distribution issues, or maybe they were just a little bit ahead of their time.
I'm sure that there will be a few new American made O-Fests popping up this year, and I'll definitely give them a try. I hope I find a winner...It's one of my favorite lager styles.