As for the others, it is unclear–no matter what way they split that group there is development for all the characters.
I agree; if you look at some of the possible combos:
1A) Regina, Snow, Charming. Goodness knows those three have some issues to work out
2A) Emma and Hook. We know CaptainSwan is going to be teased
1B) Hook and Regina. Possible love connection
2B) Emma, Charming and Snow. Family time. Charming hasn’t gotten to see Emma as warrior yet.
1C) Charming, Snow and Hook. The Charmings need to get to know Hook if he is going to be a contender for Emma.
2C) Regina and Emma. Two mothers looking for Henry with some bad blood between them.
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"He was a lot of things to me" "The only conclusion was love"