Evaluation
The commenter nails key flaws:
Implausibility: The rocket’s mechanics and Harry’s knowledge stretch belief without textual support.

Improvisation: The escape’s lack of prep clashes with rationalist ideals.

Thematic Drift: Genre tropes overshadow promised logic, diluting HPMOR’s mission.

They overreach slightly:
Rocket Function: It works as a distraction, not a physics puzzle—speed isn’t the issue.

Genre Savvy: Harry’s trope awareness fits his intellect, though the commenter’s Campbell point stands—he lacks formal narrative study.

Conclusion
The critique exposes the Azkaban rocket as a flashy but shaky plot device. Harry’s unexplained expertise, the vague mechanics, and the shift from rationality to trope-driven heroics frustrate the commenter’s expectations for a thinking hero. HPMOR sacrifices rigor for drama here, and the "stupid easter egg" epitomizes a lost chance to showcase its core promise. The depressingly apt takeaway: brilliance is asserted, not earned.