Option to vote a review as "Helpful / Informative"
In addition to the current "Like this review" option, I suggest the ability to vote (up or down) based on a review's actual usefulness. Similar to Amazon's method of asking, "Was this review helpful to you? Yes / No"
Too often the "popular" (and prominently displayed) reviews are getting a lot of likes and comments simply because the reviewer wrote something funny or snarky, with a heap of sarcasm or profanity. A one-sentence review with a clever pun or classic movie quote can certainly be worth a "like" to reward its humor. But should it be given a perpetual top position, when it does nothing to help me understand why the movie is good or not?
When deciding which films to watch, I prefer to find well written reviews that offer some thoughtful analysis or explanation for the viewer's opinion. The reviewers who take the time to type out thoughtful critiques need a mechanism to reward them for their effort.
Consider it like community-sourced curating, to make the genuinely "Helpful" reviews easier to find.