Mod ratings are actually just almost as unreliable as user rating to determine resource's quality. As have been stated in main post, hive couldn't retain consistent standard among different staffs within different times. It's just the moderator's/reviewer's personal scoring after all. So there is no point in defending it.
To solve this is by displaying good reviews atop of the resource thread, so you can judge quality by reading those reviews before downloading. By reading reviews you can acknowledge what's interesting/good/lacking about the resource, no matter when the reviews were written.
The challenge, however, is to have reviewers competent enough to write proper official reviews which are credible enough to be a view-point for judging a resource's quality. Most of them are just saying, "I think this one is well-done/lacking", etc in their reviews. No offense but those are not good enough, and frankly, not cool

A good review should have told the reader about the general idea of the resource and what's interesting about it and what not. Just an example:
"ABC is a map about bla..bla..bla. (General description about the map from the reviewer's perspective)
ABC features x, y, z (explains the features of the map and its advantages)
However, when this review is written, it can use some improvements: (lists all reviewer's suggestions)"
The example could've been better but that's what I have for now. This way the review will remain valid no matter when the review is written. With a rating, such thing can't happen.
I know this part is out of place but I don't know where else should've I posted it. I won't bother starting a new thread neither.