Knots are allways a work in progress, especially braid to leader knots. The slim beauty is a big knot, no better no worse than any other, just big.
No good saying this knot is good and it works for me. every one will have different combinations of lines, differing pics per inch, coatings, diameters, bs for their size and both braid and leaders will differ in hardness.
You can say this is a good knot, but for another it may fail as we have to many varieables.
Most knots suffer from a similar problem, the bending action of the braid, the outer radius needs to be longer than the inner, so the outer part of the strands carry more load than the inner, hence the outer strands break and the line / knot fails.
A slow spiral around on the way down the leader is better than it being tightly wound, on the way back it does not matter a lot. With the slow spiral down their is less bending of the braid on that item, this also increases the footfrint of the braid thats under tension.
Other than that, a bimini would work where you have two legs to carry the load.
Generally speaking braid knots are 60% of abs if you do it well, with the slow spiral down knot you can get a little better.
If you want to hang in with a single line going into the knot, try the PR knot, or the Sebile knot if your game.
Other than that have a look at the new pullon leaders on my site this is a totally new concept and I normally say 99% strong.
Paulus