Yes Coogler admitted he had issues liking T'Challa at first because he seemed too perfect. Cant remember or find the video, but I know he admitted to learning to love him.
That sent me down the rabbit hole to find this video. Seen it before, but it illustrates here WHY Coogler did what he did with T'Challa. Because the Russos decided to make Civil War be the film his father dies and not something that happened already.