2 agility points for that? I don't think so. We can get more.
We do have more, since we already have the ability to use silk in the way you described later in the post. It'll almost certainly come up later in the years that Jing should have left barring retarded Codex decisions that lead to his skull being ripped off by Zhang Jue or getting eaten by Yang Xue in the next update. Why is there a rush to pick up all the silk tricks possible right now, right before we're about to fight the best young pugilists that China has to offer?
Combat moves like ripping off someone's sash? Man Tiger Pig is as much a fighter as he is a trickster and out thinking our opponents and surprising them has saved our asses time and again.
Those trickster moves managed to win us the tournament by making our foes not want to fight us, but they don't convince anyone that Jing has better kung-fu. Trickster victories are fine in the context of needing to win, but needing to win and also demonstrating that your martial arts are superior means that beating someone by disrobing them or tying them up only adds a rematch with less trickery into our schedule.
treave has said that somewhere that we might need to face a lot of our tournament foes again because our trolling wins didn't actually prove superiority over Jing's foes.
Besides, I'd hardly call disarming or restraining an opponent a non-combat move, and wrap the silk around someone's neck and garote them and then tell me more about how it's non-combat.
We can already restrain foes and theoretically do the latter, though I'm not sure if you actually want us to kill our foes in our challenges. As for the former, that's just speculation. I don't recall treave ever mentioning anything about us being able to disarm folks with the stuff with just the sleight of hand upgrade.
Point is, we've got it, so let's make the best of it. It can be an awesome addition to our arsenal or it can be a total waste. Adding a slight bonus to our sword skill isn't going to mean we can take on Bai and it isn't worth lossing out on the plethora of options increase sleight of hand or traps could offer.
We already have fantastic bonuses from it. Are there more? Certainly! But the time to go for them is not right now in lieu of picking up actual combat skill right before we're going to jump into a lot of combat. We'll still have the silk ability after we challenge people, what's with the rush right now?
Not really, a guy like BJ probably isn't accustomed to the sort of trickery and sleight-of-hand in these sort of techniques.
He's fought against hundreds of rogues an experienced foes, just because he abhors the unorthodox does not mean that he's ever fought it. From us in particular, he probably expects some sort've bullshit thing.
And come on dude, we won't be taking his sword from his fucking hand, that's a terrible idea.
That's exactly what I'm saying, but some sleigh-of-hand advocates seem to think that this will be possible.
We'd probably do something along the lines of distracting him with a lot of quick, flashy movement then firing out the spider silk before he can properly react.
Firing it out to do what? It's not sticky spiderman stuff, it's not going to achieve much more of anything than tearing off our sleeve and throwing it into his face would.