You're welcome. =)
Like I said, the mouth isn't bad, but I wasn't sure if it was intentional, so I figured I'd better say something anyway. =) Yes, you're right, the mouth
is slightly ajar in the original sketch. The current pixel art doesn't read so much like
slightly ajar as
raised lip and snarling, but then, that seems to fit her personality, no? From what I can tell, she's not a happy-go-lucky lady, so...
As to the pose, it looks
somewhat more natural, yes. The main issue remains albeit to a lesser degree. Her body twists in ways that might be
possible but most certainly are not comfortable. Parts of her body suggest a perfect side-view, some suggest her body is turned slightly towards the viewer and others suggest she's turned slightly
away from the viewer. The two areas dealing with the worst contortion are the transition from legs to torso and the upper torso/arms/neck area.
(Something about her feet also feels "off" to me, but it might be that's simply because the other issues are making it difficult to get a read on how she's supposed to be standing. Though I'm fairly sure her knee is
not where her kneepad is unless she has her foot pretty far twisted inward at the ankle.)
For that matter, her arm-with-shoulder-pad is
really off. With the way you've portrayed her neck, her shoulder should be a fair bit more to the (viewer's) right. Which also means you should show slightly more of the front-side of her shoulder/upper arm, and a fair bit less of the back-side.
The location it's in now is, I think, a left-over from the remarkable contortion of the original sketch, which showed off half of her upper back and half of her lower belly at the same time. (It's not
quite that bad any more.

)
The shoulder-pad's angle also clashes with her arm's angle--it's not possible to bend your arm there, so as a result, it eh...sorry to be harsh, but it looks either like the arm's broken or like the pad is a cardboard-cut pasted on with some glue.

There's some other anatomical issues as well, mostly dealing with the muscles on her legs and arms, but I'm not going to point those out for now, since the way to fix those depends on the way the pose itself is fixed, and pointing out issues that can't be solved yet doesn't seem particularly helpful to me.