I don't mind the overlap of the center two, I think it emphasizes how close in formation they fly. I like the diagonal line. Exposure and sharpness good.
Two minor points for me:
1)I wish the lead birds away wing was down more, like the others
2)I might consider toning down the brightness of the shore line just a bit. I like the sense of environment it provides, but think it might be a more effective framing device if just a bit darker.
Great job with EXP and sharpness. Love that you got them all against the water. Also don't mind the overlap. Might even take some from the top (about half the brown area) and accentuate the diagonal more. They are a beautiful site!