A major flaw I see in your grading system- do all of those criteria REALLY make a chronicler? The only two we have really known are:
Takua- who fails in restraint and, to a degree, wisdom. Also, I remember few good speeches from him.
Hahli- She's hard to judge, as we knew her AS chronicler for such a short time. She never showed us much "Staying Alive"- even as a Toa, she has been a bit of a "damsel in distress". We never saw her carve, and she's not much of a crowd-pleaser, lacking both mysteriousness and coolness.
I think Taipu would have been an excellent choice. He has an ENORMOUS desire to travel, and indeed has many parallels to our old friend, Takua. Kapura as well- he is certainly one of the most INTRIGUING of the Matoran, and he excels in all of the categories in my eyes. You left out a great deal of other important traits, such as bravery and endurance, which Kapura also excels in. I voted Taipu, but Kapura still seems a more worthy choice than Kopeke in my eyes. I'm really afraid the win may have been caused by BZPers' common love for Ko-Matoran.