chilled monkeySo does Revan.
Except for the fact that Kun is not unknown AT ALL seeing as he has numerous feats to his name.
The problem lies in substantiating the value of many of those feats relative to what we see in the rest of the saga. He defeated Vodo in a duel. Terrific.
How capable a duelist was Vodo?
He stalemated Qel-Droma in a duel. Terrific.
How capable a duelist was Qel-Droma?
I myself have historically been one of Kun's most consistent supporters, but in regards primarily to his skill with a lightsaber there simply isn't anything contextual to work off of. He wielded what was at the time a unique lightsaber, modifying or creating a style around its use; many take this and attribute to him a Mace Windu-class ability with the lightsaber. But quite contrary to Windu and his Vaapad - which have been tested against not only multiple opponents using multiple fighting styles but some of the very best of opponents the mythos have to offer - we can't actually effectively gauge how efficient Kun's style would have been against opponents other than Vodo in the grand scheme of things.
Even the accolades he receives are dubious when looked at as part of a bigger picture. Kun and Qel-Droma are both noted in the narration of The Sith War to be "master swordsmen." One might take this and immediately throw both of them up there with Kenobi and Skywalker. Then of course, we point out that in Dark Lord: Rise of Darth Vader, the Jedi Knight Roan Shryne is granted similar praise, deemed a "master of the sword."
Roan Shryne proves unable to defeat a neophyte Darth Vader.
Then there is the crucial question of his speed in combat. Put simply, how fast can he move relative to others in the saga? A debate with Lightsnake a few months ago brought up again the idea of upper-tier Force-users simply dodging the Force-blasts Kun is so well-known for and blitzing him to take the fight to close quarters. I initially opposed this argument, but looking into it now it makes sense. There has never been the slightest indication that Kun can keep up with the speed demons like Bane, Mace Windu, Yoda, all of whom he is often pitted against. We have, to my knowledge, no way of even confidently placing him in any vague tier.
I will recant my request that someone substantiate the depth of his studies; that appears to be one field that, upon further investigation, has been sufficiently explained. To be clear, the size of his arsenal of techniques is not in question. But until someone can explain to me how 1) his dueling ability can be quantified or 2) his command of the Force can be put into perspective, I can't see a reason to use him in a standard versus thread.