Critic: A novel cannot be of the highest quality unless most readers become emotionally engaged with the imaginary world it describes.
Evidence
A novel cannot be of the highest HQ → EE quality unless most readers become Emotionally engaged with the imaginary world it describes.
Shifts of narrative point of view SN → FA within a novel tend to make most readers Focus on the author.
Conclusion
Thus shifts of narrative point of SN → ~HQ view within a novel, either between first and third personor of some other sort, detract from the merit of the work (not high quality).
Evaluate
The argument assumes that FA → ~EE readers who focus on the author do not become emotionally engaged with the imaginary world the author describes.