Could her alignment be a little bit better? Goodness yes. That rounded spine and tucked pelvis she's got going on....that's what we're trying to avoid. She's awesome, but it should look more like when Carrie-Anne Moss does it...you remember her from the Matrix?! Sometimes Navasana goes easy and other days it makes me want to die. However, I always try to remember something one of my favorite teachers, Kathryn Budig, says:
"You aren't going to die in Boat Pose."
It doesn't last long (unless you're an Ashtangi) and you'll be so happy you did afterwards. So hold on tight, lift your chest, and keep that boat outta the water!