First this movie has no similarity to "Frozen" in any way. The plots are totally different. Disney does not own rights to the arctic. If that were the case the producers of Lost in the Arctic could sue Disney, since it was produced over 100 years before.
The artwork and scenes are amazing. The animation is also very well done. People need to realize there are more methods of animation than cartoons. Claymation for example, Box Trolls as another. The Dark Crystal a third. I watch hundreds of animated films and the animation in this one is high quality! Even that decrepit crow and quirky flying, it looked like it was struggling just to stay in the air.
I saw one reviewer state an objection as a "First Nations" person. First Nations??? Sweetie First Nations is just something the PC police came up with so we would stop calling you Indians. The actual proper term is Heron, Mi'kmaq, ect. That said, How would you know about Inuit culture if you are not Inuit? Rather presumptuous don't you think?
Even the Evil Shaman was provided a back story as to what hardened his heart. If any of use lost all our children we all look for someone to blame, even God. In the end, he repented and sought and received the forgiveness of the clan. Showing anyone can make mistakes and might receive forgiveness.
What more could you want in a story? History, geography, a look at another culture, and a life lesson about family and forgiveness.
If you ask me, I think this film likely gives a very good representation of Inuit legends, culture, customs and daily life.