Meh I'm still satisfied, even though the ending was pretty rushed for sure. our sweet cinnabun got everything she deserves in the end <3! And honestly the way she finally learned to smile conscious is kinda poetic. Just as her co-worker said, she's terrible at doing things for herself... But ofc she excels when it's for others. Feeling like she had to smile for Hanako's smile to return is what triggered it. And that's also what the last panel means by "original intention." She smiles and remembers how to because she remembers that if she smiles, Hanako smiles.