I had stated that i would come back to this thread for further investigation about the knot at reply#16, so here we are again.
https://forum.igkt.net/index.php?topic=7549.msg49215#msg49215 See below another result, from your idea. It can be compared with the EBSB bowline.
Not so original, but I like the way it ties, and tightens and unties.
And how secure it seems to be. Nice candidate for harness tie in?!
Yes indeed, it has a taste of EBSB structure with the difference that you use a crossing knot to capture nipping loop's crossing point.
That doesn't mean that it falls short on compactness and security, on the contrary, such a strong and powerful returning structure would make me feel safe, when used in life critical application.
Such knots with rather complex returning designs around a nipping loop, have to be tested for their jamming profile, and if they do accomplish a fairly easy decompression, they might even replace an F8, otherwise i don't see any merit.
What's the difference between first and second image knots?
Tip: Same nip, same returning structure and the second is TIB.
The difference is that at the second knot, the bight leg captures directly the nipping loop and not the nipping loop's crossing point.
This slight adjustment makes the knot TIB, even in EBSB, and maybe offering some degrees of freedom at loosening, with some cost at nipping loop's stability, which is greater in your design, but i wouldn't be concerned with such a powerful, returning nipping loop binder.
You may also expand the inserted nipping loop bight, as shown in second image to formulate a double splayed loop version.
i just wonder as to why you haven't received any comment for such a calibrated knot.