Summarise the permitted or blocked domains on the dashboard according to the second-level domain that they come from - maybe also allow compiling the data according to linked domains.
For example all
are my top two domains, they would be listed as simply
or some other indication instead of "(+)" that it was a compilation of subdomains.
The additional suggestion is that
and other such domains used by netflix could be folded in to that so one would get a list by "origin" of the domains rather than a breakout (initially) of all the separate subdomains.