Well, I don't see the problem with this. Obviously the detail and logistics need to be fleshed out, which is probably why it's back until October. Also, providing those unable to get the vaccine and underage are all catered for then bring it on.
I have no time for foil hat wearing anti-vaxers or the obnoxious refusnik @rseholes who stubbornly refuse to get vaccinated, despite all the evidence showing the benefit to both the individual and the country as a whole. It's the vaccine that is allowing the opening up and the return to some level of normality, including football etc.
If you don't want to have the vaccine that's your choice but don't moan if it means you're excluded from some aspects of normal society that are only available now because 10's of millions of people have decided to get vaccinated.
As for testing, if that is allowed for entry, then fine but this should be paid for by the unvaccinated individual (as per getting a flight) and should not be "free" (i.e.. paid for by the tax payer). The vaccine is paid for by our taxes and is free for everyone. Your choice.