For those who are 'anime only' this show is one of the best you could watch. That said, i am of those people.
the show definitely feels engaging and sometimes emotional. but seeing as others not liking the show because it was rushed and they skipped the arcs is understandable.
We can see how after the parting, the show only showed some scenes of the children growing up while also showing parts of Emma and the others adventure. That itself kinda ruins the potential of a third season. in the same time, I'm pretty sure there are parts in the manga and characters that didn't show up in the 2nd season.
Overall i would say its a great anime. but it is definitely rushed and has disappointed the fanbase of the show.