When Felicia took her down, she wound up on the bottom. She reversed because Megan seemed too scared to grapple, gave her too
much space and didn't know what to do. She basically kept the same position while Felicia was rolling to take her back (and even had her head wrapped in Megan's legs, but Megan couldn't also capitalize on that one).
Then, when Felicia took Megan's back, instead of using her hands to unhook her legs or hands, Megan literally pulled Felicia's head towards her, spending unnecessary energy. Then, she crossed her arms and looked very desperate, enabling Felicia to ground and pound her.
Megan seemed scared to be on her back. She made many mistakes and lost many opportunities. It's something she has to work on.