No surprise there
'Some sites may not let you in at all and may not work as you expect them to as they actually require cookie consent for some functionality."'
There is an exemption from consent where "the cookie is strictly necessary to provide an ‘information society service’ (eg a service over the internet) requested by the subscriber or user. Note that it must be essential to fulfil their request – cookies that are helpful or convenient but not essential, or that are only essential for your own purposes, will still require consent." [ICO guidance on PECR]
The cookie issue is strictly a matter for European Directive 2002/58/EC in the EEA and PECR in the UK rather than the GDPR, but making consent obligatory is strictly unlawful under both. Of course this doesn't bother anyone on the supply side. Our research into the GDPR compliance of web sites strongly suggested that nobody in business gives a toss about complying with the law. It might as well never have been implemented.
However the apparent popularity (on this thread at least) of the announced blocker suggests many users don't care about their privacy either, but some of us do, so it's nice this blocker is not a default or mandatory.