I think I am going to try this with my next setup. Why not just eliminate the biners and run the strap thru the loop then to the rings?
This is what I've been doing too since I got the buckles. I have noticed that the strap is getting a little fuzzy at the loop and it can cinch down pretty tight some times, making it a little more difficult to loosen. The biner would prolly put less stress on the strap and loosen quicker and I can see it being a little quicker still.