My guess is that they probably had to cut back flavors in order to save money for the move from Seattle, WA to Arizona.
A large variety is nice, but as a person who is a bit overwhelmed by lots of choices, I prefer menus to be dialed down a notch, and for them to only offer their best flavors.
I tried probably around 25 flavors at MBV, and only liked about 2-3 of them. Getting the 2 or 3 I liked to taste good on the second order was another challenge I had.