Apparently there were several former, well-liked BG directors that were called in to give creative advice. They all seemed to be part of the more traditional crowd, but unfortunately their advice was probably duly noted and mostly thrown out.
There have been many concepts in the past for Das Festhaus shows that were ultimately shelved. Some of those ideas were already seen partially in previous shows. Even "This is Oktoberfest!" contained some of these ideas in 2010-2011. Roll Out The Barrel, for instance was shelved twice. The last season of TiO contained some early concepts, and even had a pattern around the stage resembling a wooden barrel.
In 2012, the park slipped up in announcing Roll Out The Barrel too soon. The park still didn't have the show ready, so the switched to plan B: Entwined. Don't quote me on it, but supposedly all of the costumes for Entwined 2012 were designed in less than six weeks; almost the same amount of time that it took to bring the full show together (two weeks to spare).
I'm not saying that the park has no choice but to keep playing TiO forever. However an Oktoberfest show with a 100% live band is the only formula proven to work in that venue during the main season. All other shows struggle for many reasons, but one of the biggest is sound.
Bavarian brass music (the same used in TiO) was perfected over many centuries to fight bad acoustics of beer halls such as our huge, box-shaped Festhaus with a stage in the center. Even Busch Gardens Tampa's much smaller former-Festhaus, now called DragonFire Grille, still suffers from bad acoustics, even after changing the stage to a one sided stage in the back of the hall.
Busch Gardens needs to decide unanimously on what Das Festhaus is and hopefully make the right decision. Furthermore, they can't keep putting together scraps of disoriented ideas. And they can't keep changing things last-minute, and still hope for it to be a good, or even decent show. I fear that they will one day give up on German shows altogether, but that is a whole other thing.