@simmerskool and
@nicolaasjan
The problem is only AdGuard knows which 201 rules accounted for 90% of the blocks and we (at least I) don't know which. Because AdGuard has a DNS service (and a feedback opt-optout in their extension) they have a pretty good idea which domains are blocked (and can assess which rules triggered those blocks).
I had no intend to bring EasyList filters are useless or full of bloat. The exponential graph of the Brave research shows that the added protection maxes out. Mind teaser was that it was probably more effective to use AdGuard onlt filters in uBO and disable all other stuff (except for the ones you added manually).