One of the points of this change is to make blacklisting "opt-in". Currently, they are not: when you use a given interface like hive.blog or peakd.com, the blacklists are chosen for you. This change will allow each user to make choices about which blacklists they want to subscribe to (or if they don't want to subscribe to any at all). From what you're saying, I would think you would be in favor of this change.
RE: Hivemind API update to support decentralized blacklists