Enjoyable despite weaknesses in the writing

Rating: 8/10 (21 February 2018)

As others have said, the movie suffers from weaknesses in the writing and and an under-ambitious plot, but the imaginative depiction of Wakanda, combined with Chadwick Boseman's charisma in the lead makes the whole thing pretty enjoyable all the same. Overall, I liked Black Panther in Captain America: Civil War, liked him throughout this movie, and came out of the theater looking forward to seeing more of the character in Infinity Wars.
My main gripe would be that the conflict motivation in the story is highly under-used. The premise is pretty interesting, that Black Panther's home country of Wakanda is as big a technological power as Asgaard, but has been concealing this throughout history and likewise has been remaining neutral in world conflicts, even though their technology could have been a powerful force, for example, against black oppression throughout the ages.
It takes very little imagination to see the widespread political outrage that this could cause if it leaked out, with potentially thousands of people and powerful radical enemy organizations trying to take control of that technology from T'Challa. Instead, the writers decided to limit the antagonistic forces to basically just one disgruntled guy. As a result, the movie comes off as a bit of a knock-off of the first Thor movie, except that here it's Killmonger instead of Loki who threatens a one-man coup of the kingdom.
Anyway, still enjoyable, as I said, but I will always regret what the movie could have been