Great pics Shuan!!! I think the screeners are just cranky lately... they've rejected a few GREAT shots of mine as well.
If it were me, I would enhance the color saturation and contrast a bit. These don't look "soft" to me, but then I've uploaded some photos that you could see a mouse hopping in the grass between the runways, and they still get shot down for being soft.
My two cents would be to enhance, re-upload, and hope for a different screener!!!
Keep up the great work!
On this shot, I used no flash, and turned the lights on the panels all the way up. I did do a bit of editing, but they finally accepted it.
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Photo © Freight-Dawg