You are correct about the evidentiary standard being roughly equalised‡, and the Baker review confirmed this.
A legitimate concern though is about forum and jurisdiction. The treaty currently allows the US to request extradition for acts committed in the UK that are not a crime in the UK, but there is no corresponding entitlement for the UK to make such request to the US. Many people in the UK feel this is an encroachment on UK sovereignty, and not something that the US would itself offer to another country.
(‡ shame it had to be rounded down, rather than up)
A legitimate concern though is about forum and jurisdiction. The treaty currently allows the US to request extradition for acts committed in the UK that are not a crime in the UK, but there is no corresponding entitlement for the UK to make such request to the US. Many people in the UK feel this is an encroachment on UK sovereignty, and not something that the US would itself offer to another country.
(‡ shame it had to be rounded down, rather than up)