I think most people that reject the new clip "design" do it just on the basis that it is ugly, but not because they see any error in Roy's interpretation of the pictures (that are the basis for the shape calculation). And that's ok, because sometimes when things look wrong or common sense tells you they are wrong - well, maybe there was an error somewhere that you can't exactly pin. For me the quality of that picture is so bad that I personally can only identify where the rivets are, but not the shape of the clip.
Anyway, here's a little test to see if in practice you can end up with a shape like this if you are a sloppy prop maker (which I'm not, so take it with a grain of salt).
Staring with a piece of aluminum sheet that I obviously cut too wide for the clip I have:
So, I take a mental measure where the clip is at the top of the sheet and do a sloppy cut at an angle, so it is OK at the top but it goes wider towards the middle and the bottom:
So it actually fits and I bend the sheet around the d-ring. However, since in the middle it is too wide - the clip cannot turn at all from that position. (which is exactly what happened with this clip the way I cut it)
Then I realize it is still too wide there at the middle. So I take the ring out, grab the cutters and just trim one of the sides at a random angle, because that's all I need for it to fit:
And now the clip fits and rotates as intended (and I have a very ugly clip, but hey - it works!) :
I didn't finish it with rounding and rivet holes, but I think I'll end up with something pretty similar if I just roughly cut it and drill the holes without taking any measures.