I’m definitely ok with this. Emma’s story will be complete. The only main characters I can see continuing to maybe have some interesting storylines left are Regina, Zelena, and Henry (aged up). Have the other cast reappear in flashbacks from time to time especially Rumple since that’s everyone’s favorite version of him
anyway.
I’m also in the group of wanting to see what a reboot with new main cast could be. Even though the show isn’t as enjoyable as it used to be, A&E were capable of creating a truly compelling storyline in the first 2 seasons or so when they were still writing from what had been planned out from beforehand. With the right new cast members, I think they could do it again.