I missed it in the theaters, but managed to catch it recently on Disney+.  Going in, I wasn't sure what to expect.  Cosmic Marvel is not really my wheelhouse, and I knew next to nothing about the Eternals.  I had also heard about the mixed reviews the movie had received.  But at the same time, I remembered that I had doubts about Guardians of the Galaxy and that ended up being one of the better MCU films IMO. 

So I was pleasantly surprised to discover how much I enjoyed it.  I liked that it was different from the standard MCU fare... a sort of palette cleanser from their usual bombastic action comedy.  I also really enjoyed the characterization of Sersi and thought it was a nice change of pace from the typical female superhero we've been getting.  Every time DC or Marvel gives us a new female superhero, I feel like they are trying to "out-badass" the men by making them stronger, more powerful, more aggressive, whatever.  Which is fine and there's a place for that.  But I liked that Sersi's heroism and strength is grounded in her compassion and love for humans, rather than being the best fighter or most "powerful".  I thought it was a great move to make a character that had a non-aggressive power be the hero of the story.

From a business standpoint, I also think Eternals is what happens when Marvel plays with house money.  They know their movies are going to be profitable, and they know people are going to turn out for them.  I also think they knew that this movie was not typical for them and might get some pushback -- that this would be the MCU's The Last Jedi.  But I think they were willing to spend that money and good will for the long game.  My guess is that they see the Eternals as establishing another important puzzle piece for the future of the MCU, so they are willing to go a little into left field to get that piece in place.