I went ahead and read the bonus chapter... really good stuff!
Jagoth's characterization worked for me, as far as it went. But he seems a little... off. Probably because you're having problems figuring out how to do his redemption. And since you don't really know who he is at the moment, we don't either. It's a struggle I have myself at the moment, so I know how you feel.
Otherwise, it was very well written- the fight scene flows smoothly and seems believable enough. Afterall, he seems to have a "coach." You certainly got the chaotic element down pat! I have to wonder what his goal really was, though. I mean, if his goal was to get into the city undetected, then he just ruined his chances. He HAD to see that coming! So I really hope he has a workable backup plan, and that you reveal it soon, 'cause it's not looking too good right now.
As for the bonus chapter (which I'm going to go ahead and mention some things from): this is where I really got hooked. And that's a problem, since these aren't your main characters. When what the supporting characters are doing is more interesting than the MC... you see what I mean.
Anyway, you handled the aftermath of the fight very well, keeping it interesting and using it to build character all at the same time. I'm also guessing this is the same guy we saw in chapter 1? Anyway, I'd recommend really getting into your MC's head, 'cause until you understand him, you won't be able to write him believably. At least, that's the problem I have...
Good work! Keep writing, we'll keep reading!
EDIT to add:
You know, I think your problem with Jagoth at the moment is that you're trying to show too much of him too fast. He's a complicated character, sure, with a bunch of trauma in his past and complex motivations and demons. However, this is chapter 2. He's your main character- and while we've met him in chapter 1, this is, for all intents and purposes, an entirely different person. So start slow.
Take some time to introduce his new persona, and don't fret about "advertising" it too much. I'd be perfectly fine with it if you didn't start hinting that he's Jarl until chapter three, four, or even five. In the end, you want your readers to think "Oh, why didn't I see that before!" when you finally reveal that Jagoth is the Jarl from the very beginning. If we already know it, it takes away the mystery and the inherent interest in a "new" character.
At least that's what I think. (and I got out of bed to type this, so be grateful!)