Hmm...I have a lot of feelings here.
On the one hand, it just feels very off to have a sequel to a movie not really feel like a proper sequel...obviously IRL events and creative decisions kind of made that impossible because they're literally taking out the main character of the entire franchise, but it pivots the movie to reacting to and addressing something that happened in real life and is still very emotionally raw for a lot of people (and centering or focusing on the death of a real person) rather than feeling like an actual Black Panther sequel...at least until the end when we get an actual Black Panther showing up.
Speaking of which, the suit looks fine (more gold than T'Challa's silver), but I think it might be difficult to push MCU Shuri as a Black Panther and a legitimate successor to T'Challa. She just doesn't carry the same vibe or strength that T'Challa carried in the suit, especially because this take on her wasn't designed that way to begin with and she's nothing like comic Shuri was when she became Black Panther.
Namor...I'm not sure how I feel about them grafting Namor into an actual real life culture. It feels like it takes away from his Namor-ness with everything that is being thrown on him to justify him being an Aztec version of Namor, but it makes him look more busy and complicated than the regal and pristine Namor from the comics. The actor looks great and has a strong physical presence at least, although it's not the Namor voice I always had in my head.
M'Baku is still the token black male main character in this movie. I wonder if there were ever plans to bring in Vibraxas or Taku at some point or if the plans to expand the cast were thrown off by Chadwick's death and needing to throw in Riri Williams, making the cast predominantly women focused because all the other male characters either died or were jailed.
It continues to feel weird for me how much focus and attention Riri Williams is getting in a Black Panther movie when she's ostensibly an Iron Man character. She's even getting a full-blown armor. Like, isn't that stuff you save for her show?