I'm working on the same pattern right now. Except my geese are flying the opposite direction. This means the only place where points meet up is at the center of the block. All other points meet at the bottom center of the next goose. I think my seams are pressed the same as yours. I was pressing toward the dark, but like you said, the seam at the bottom naturally wants to go toward the goose. With this layout it's been very smooth.
Anyhooo, by pressing the seams open, it looks like you've found a great solution. :) Good luck with the rest of your blocks!
Jen