Imho it would be decentralization.
Just compare with the current status: a couple of hand-picked high rank users are in the default trust list and they are "the police". That's centralized.
If the change will happen, less ranks will add feedback indeed, but the feedback will count more than the current "untrusted" feedback. Much more people's feedback will count and the only condition is that you are "old enough" in this forum. Which imho is closer to decentralization.
Decentralized trust system (it could never exist) everyone can leave a trust and each trust is worth in the same way. allow less users to left trust is closer to a sort of centralization not the contrary. However the Blazr request is very good in my honest opinion, please remove the scores and much important the 'warning'....