If Morrigan could smile right now, she possibly would have. As it was, once Maia was on, it took her a moment to adjust to the fact she was carrying weight before she spread her wings. She got a running start before she managed to take to the air.
Flying while carrying Maia on her back was interesting, but Morrigan adjusted well. And from up here, they certainly had an eagle's eye view of everything. Especially Morrigan since she literally had the eyes of an eagle currently. She let out a cry, circling around and letting Maia choose what she wanted to hit.
Morrigan could also dive, pick up the smaller Reapers, like husks, in her front claws and ascend again, dropping them to their demise. But for now, she'd stay in the air.