As interesting or not as interesting? Not that I myself have an opinion one way or another, since I haven't seen, as opposed to read a synopsis of, the ending. Just that the way you worded the sentence seemed like it might want a "not."

Btw, I gather that from the producer's and writer's(s') p.o.v., with Anna still in their mind as protagonist, the deliberate double misdirection and switchup as to what constitutes the act of true love that will save Anna was what they were fundamentally working towards, and was what motivated Del Vecho to make the movie in the first place: there's a kind of meta going on where the characters are searching (twice) for the man who will provide the act of true love that saves Anna — as the genre might make us expect — whereas what the story actually gives us is Anna sacrificing herself to save Elsa, this being the unexpected act of true love that ends up saving Anna as well as Elsa.

(If you haven't yet read the Jennifer Lee interview, I reiterate my recommendation.)