Board Game Arena

If an implementation has to be perfect to give one's approval, what would warrant a reduced star rating?

It would be difficult to not see it as a slight by both the reviewer and developer if an approval is given with a reduced star rating. Any issues should be addressed rather than indicated at that stage.

It is probably better if the approver is anonymous too.

Maybe it's just me, but what do you mean by "star rating"?

N_Faker is talking about the new Reviewer system (more informations here).
Reviewers can test new games still in Alpha version and rate them to say if they think this game is ready to be released on BGA or if it needs a little more work.