NRWC, i like your post. I think you can figure out a lot of things that most people couldn´t (about Jade). But Jade, in my opinion, doesn´t have a lot a "tools" as you said, and she really has some serious disadvantage.
First of them, she lacks a teleport. Really, maybe this isn´t a big deal, but when she is pressured is so damn hard to get out of the "battle". Indeed, she has the green kick, but is not enough. Besides, zoners like Sindel or Mileena could keep away Jade, and the Jade (like Sonya, IMO) is a character of close kombat.
Second, Jade lack of any air movement. Indeed, she suffer in a great way againts character who has a lot a movement in the air (for example KItana (2 moves), Sonya (2 moves), Sindel (fireball moves), Ermac (teleport and short-distance fireball) and especially against Mileena, the Queen of Air Kombat in MK9 (IMO, again), who has a ridiculous aerial superioity thanks to her telekick and fireball-and the damn instant air sai!).
Third, she has a lot a normal moves that are so ****ing punishable if these moves are blocked. I think she suffer a lot, like Kitana, like characters who can punish in this "disadvantage frames" with normal or especial moves and start a kilometrical combo. Of course, this is my opinion but most of their staff moves are extremely punishable on block.
However, you said, she has a lot of positive things to consider. Their reset combos are fenomenal, but too hard to pull of. I mean, yeah 50% with 2 meters, but there are character with shortest combos and 1 meter (or meterless) can pull of 40% combos in easiest ways. Sure, this dont erase Jade´s ability to reset damage.
Flash kick is great and there is no doubt about that.
The damage is pretty cool, indeed.
But anyway I dont think Jade is one of the best character in the game. In fact, I believe (IMO, again) she is under Mileena, Kitana and Sonya (in that way) and paired with Sindel (IMO, again, not the best character, but maybe because I like characters with close combat pressure, and Sindel lack that kind of fighting style), and maybe worst. I think she is definitely mid-tier.
Anyway, Im gonna give her another chance, maybe I could regret this post later!
But right now I giver Jade a 7.2
Cheers!