Reviewers lamented that the author's latest novel, with its formulaic plot and predictable character arcs, was an utterly _____ effort, adding nothing new to the genre.

✓ Correct Answer: Option C

The phrases 'formulaic plot,' 'predictable character arcs,' and 'adding nothing new to the genre' all describe a lack of originality or creativity. 'Uninspired' perfectly captures this sentiment.