A plot doesn't have to complex or convoluted to be good, arguabley many classic films have quite simple plots that are ust executed well. Le Mans has a plot, just a simple one, and it was executed well for its time.
Action scenes are important, but they don't make the movie, the connection to the characters does. If they deliver on action but fail on giving us characters we're bothered about then the writers have failed. A lot of films and TV shows fail to deliver compelling characters these days though.
We don't yet know enough about this film to determine if it'll be worth watching or not, however if I were a beting man I would bet that it's not likely to end up being a classic over time. As it is I have zero interest in this movie, at least until a trailer drops, then I'll decide if I think it looks like it's worth watching or not. But the cast and the details of the plot so far don't grab my interest by themselves.