In general, this sounds like a good idea to me. There are a lot of reviews that aren't in good faith, or aren't useful because they're something like "0/10 this sucks" or "10/10 lol", and I don't really see those as valuable — in fact, the opposite.
However, the evaluation of what reviews are and aren't worth keeping would have to be done by an independent third party, not the company that produced the show, and who has an obvious conflict of interest.
Amazon would never do something like that, which is why as a rule I would keep in mind that reviews for Amazon products on Amazon platforms are not reliable (to the extent that any crowd-sourced reviews are reliable, which is a different conversation).