I just saw Oktoberzest today and the one thing I came away with was how much potential it has. They just need to trim out a few rough bits and expand on the good bits.
First of all, "All the Folks in Germany" and "Country Roads" should be cut outright. The former is cheesy and almost condescending. Also they already sing "Eins Zwei G'suffa" so we don't need a second song about counting. The latter, while technically appropriate because of its modern use, is just confusing. Unless you know enough about German culture to get the joke or you're a big enough fan of country to appreciate its inclusion, it comes off as jarring. I would rather improve existing songs than replace them but these two are taking up time that could be spent on more traditional music. The next song on the chopping block according to you guys seems to be "Edelweiss". Honestly, I thought the quartet that sang it was beautiful despite the song not being traditionally German. I would be sad to see it go but if they do remove it I hope they keep some kind of choral segment.
The performers, as expected, were awesome. I liked the traditional dancing, particularly the woodcutting segment. However all the dances were super slow. Maybe the performers just need to get more comfortable with the choreography then they can up the tempo.
The violinist was great from how little I saw of her. I don't even remember seeing the accordionist (which is a big problem in a GERMAN show). They both should have a bigger part and they should probably play together so they can support each other and mask little mistakes. I saw them playing together after the show and they sounded good.
The thing that irked me the most was that they taught the audience eins, zwei, g'suffa, ein prosit, and zicke-zacke but never touch them again. What's the point if you don't do one or two of those between each song?