Actually it's looks like she's doing just fine on trigger discipline, a little overzealous about it maybe though. I mean the way she's crouched means she's probably in the middle of a fight, so having her finger on the trigger would be prudent. However her eyes seem to be pointing away from the top gun, so she might not be able to satisfactorily tell what's going on in that direction. She also might not be as quick, or was intentionality slower, with her left hand so she drew and/or readied it after her right.
I'm sure I'm reading too much into this though, so just move along.