Jake,
That biner flopping in the water was a problem for me, too. Like you, I like the idea of attaching the biner to the trap or dog bone better. Of course, it will add another piece of metal that can potentially tatoo the crew's head when released from the end of the boat.
I'm thinking that I will make the lines easy to remove, so that they're not something that will get in the way on days when the winds are light.