I think there is definitely a problem with the reviews for RttToEE.
A module shouldn't get a 1 simply for violating Greyhawk canon. Mark it down, sure. If the module is too long, and the monsters too implausible, some warnings should be given to prospective DM's, who may find ways to truncate and simplify the adventure. (In-fighting between different factions may help out a lot, and give it a much more dynamic feel). That would be positive and helpful criticism. But say that it is appallingly bad? RttToEE has an awful lot of interesting and challenging encounters with good mechanics and interesting NPCs, nice maps, good editing, etc., etcl It shouldn't get a 1.
Similarly, the gushing but uninformative reviews are not needed. They ignore some real flaws in the module that should prevent it from getting a score of 5. Many seem to be there in order to balance out the 1's. And that's a bad thing.
That said, I think a prospective purchaser of RttToEE would want to investigate the huge discrepancies in the scores, and would eventually be able to make a decision based on the information they present.
I can't think of a method of resolving the problem that would significantly help matters. I think a number of the reviews should be deleted, but that would lead to a lot of bad feeling and complaints. Deleting all but the official reviews would be too draconian- some valuable insights would be lost.
It would be nice if there was a way to close a review the way one closes a thread. Maybe allow the other staff reviewers to contribute if they wish. It would be a shame to allow this issue to fester.