That is a beautiful outcome, Iceblossom!
As I was working with my clue 3s, putting them into the corners of the block spaces, I realized what the issues are with the butterflies, and why it is problematic not to have the sashing -- it looks awkward where the A block neutrals blend in with the B block neutrals at the block corners, with the alternate butterfly placement; the sashing masks that issue. So I'm not sure how I will proceed, but I'll worry about that after my A blocks are constructed.
I saw someone post their RT quilt center without the goose border but with a regular border with a large floral print. It looked quite pretty. Sometimes Bonnie's pieced border works well with a second regular border, but I've seen a couple RTs like that and I did not care for the goose border followed by a plain border, so will have to decide between plain or geese (geese would allow me to use more of my pinks and yellows, which would be nice).