I'm with you. I hate those cinch buckles. I actually had to cruise the forum to pick up a different set of buckles that Brandon used to use. Instead of being flat triangles, they are round. A lot easier to loosen up. Completely trumps needing the half-hitch in my opinion.
I have both, and have found the opposite - once you learn how to place your fingers to hold the two flat triangles apart, they are MUCH easier to loosen than the round wire triangles. I switched to whoopie slings on my blackbird a year or two ago, and am actually thinking of buying more of the new flat buckles and switching back. It's a bit more bulk, but I do really like the "one piece" approach, where I never have to worry about whether my tree straps are big enough.