As a former BJJ leg lock specialist pointed it once, competition isnt the right place to zoom in on gunning for a leg lock sub if you arent skilled like Ryan Hall. You do that in training camp, and spending that long on a sub isnt grappling, that's plain stubbornness. Like an instructor once pointed it to one of his student, if the sub isnt there switch to something else.
That attitude at the end is fine, it happens. When you're amped up full of adrenaline you scream out in victory. She didn't do it to disrespect her opponent, that was probably the last thing she was thinking about. As long as they show respect afterwards its fine. People look for problems that aren't even there.
Both of them are gamers, Alexa just banked on Jessica never shoring up that weakness. Still would like to see her on a future card because she gets after it.