Hello. I took this tour in Dec 2017 and will take it again Dec 2019.
2017 was, I believe, the second year for this tour. It seems as if it is still transitioning, perhaps due to logistics or tour feedback? In 2017, we went to Neuschwanstein the afternoon of the second day, taking away from Munich time. So if you were into Munich, you had to stay behind or have arrived early. I chose to go with the tour, not for a burning desire to see the castle, but to participate. It was, after all, the 2nd day. We got there late in the day and it was a bit icy. I power-walked up to the castle, but it was dark when we exited and with my poor eyesight and the ice, this was not a comfortable endeavor for me. I have seen the castle twice - once in 1973 ant then in 2017. I do not feel I want to do it again so will choose something else in 2019. There is a nice restaurant down by the lake near by. Maybe I can stroll there rather than hike up to the castle.
In 2019, the castle visit is the morning of the 3rd day. Looks better to me even if I choose not to climb the hill. Plus there is supposed to be a stop at the Wieskirche. Great, I have never been there.
In 2017, the third day had instead a stop at Oberndorf to learn about Silent Night. That appealed to me. In reality, it was a mixed bag. I found myself thinking about it after - I always learn a lot on the tours. The museum was great as it gave some context hitherto unknown to me regarding the early 1800s. Having to stand in line for the fake (?) chapel and then be encouraged to sing Silent Night did not work with our group.
On the third day, 2017, prior to Salzburg, we did indeed visit the brewery which was not listed as a stop - I don't recall it, at any rate. This turned out to be a delightful surprise not because we got to walk around the brewery which could be same old, same old for some of us, but because of the woman presenting and then the fabulous meal served in the restaurant which was closed that day so it was only us! The beer was very good indeed - as was the meal - so do not despair.
Now, since Munich and Salzburg are quite close, did we need this filler? Perhaps not or perhaps it was the logistics of hotel preparedness.
In 2017, we bypassed Melk. I was disappointed, but I do not recall this was actually scheduled. The guide said as it was December, we could not go. I have checked and tours are welcome in December - now, at any rate. This is definitely called out in the itinerary, so I hope we stop. The tour office tells me (months ago) that all tours stop. I will check again.
So, I agree the stop at the brewery as the main stop of the day is kind of weird, what with the two cities being so close. I prefer the 2019 list to that of 2017 and hope it transpires. I will post back after the tour.