My gut reaction is to say that all reviews should require a comment, if for no other reason than to allow the author to reach out to low-raters in an effort to fix the problem (and to better reveal malicious low-raters).
That's my two cents at least.
On a related note, as a newly-minuted Foundry author, I would love some more in-depth metrics on average play time, etc, to help me improve the quality of future missions.
Originally Posted by erei1
It should be mandatory to leave a comment on 1star review.
But I suspect most of them are a user problem more than a mission bug. I recently had a 1star review from someone who couldn't find where to start, while it's mentioned under the minimap in the objectives, during NPC conversation, AND in the mission description.
I also saw a 2star review on someone else mission, with a comment like "Good mission !" I suspect this person choose the wrong rating.