Honestly I have nothing against remakes and reboots, but this movie unfortunately doesn't hook me, at all.
And I promise, this has nothing to do with the cast, nor the budget, nor the fact that they wanted to re-invent the wheel.
I can't find any reason to actually justify if I would like or dislike the movie.
I just have no interest, even a lead character being a perfect doppelganger from the original animated movie character would not change my mind.
That said, from the photos I did see circulating, I think the mermaid herself looks beautiful, and most likely played her character very well too, sadly the CGI side characters absolutely ruin the magic for me.
Just to give further details, I do remember an older live action remake of the movie, and I can say for sure, it seriously sucked, so maybe this version is actually better, but again, I can't find any motivation to go see for myself.
Maybe if someone invited me to watch the movie, I would come and watch just to be polite, but I don't have much expectations considering that too many live action remakes are mediocre at best.
The cast is rarely the problem, anyway, it's more of a whole production problem, so I can say for sure the skin colour exhibited by an actor is the least of my concerns.