You'd still need the coordinator node (tracker) for every single request, so you'd still be serving an absolutely insane amount of traffic off one central box.

You'd still need the coordinator node (tracker) for every single request, so you'd still be serving an absolutely insane amount of traffic off one central box. If you baked something like IPFS or DHT torrent capability into the application and requested your blocklists that way you'd solve the single point of failure problem, but that's asking a whole lot from a shittily maintained and poorly configured browser fork.