Yeah, I had this discussion several times before announcement, and I had hoped for the Quad option, but I wasn't too surprised they went with bipedal. I'll take a Zandalari-sized Dragon on two legs over a cat-sized or bear-sized dragon on four.
Like I said, I understand why they took the direction they did, and I accept it. In the end, I wanted a class that allows you to play as an aspect-empowered dragon and that's what I got.