I feel for you... High Plains definitely isn't among the most attractive Vivillon forms, and funnily enough according to the poll in that thread I seem to be only one who actually likes River, which is the form my region gets. I think the tan and blue really go together.
Guess they don't like the ones that have a lot of brown-looking colors on it, like River, Sandstorm and High Plains (well that one's actually orange but yeah lacks some diversity).