I think you might be missing the ‘concerning’ part. Which specific cases are concerning? I don’t find it inherently concerning that people can’t escape justice by crossing the Hungarian border, Bonnie and Clyde style.
Oh no, that's totally up to you. If you're happy with the courts in your country not being able to review the requests sent from Hungary, that's cool. Without transparent judicial review, how could we even know if the cases are concerning?
Too explicitly spell it out, op is saying here that if any one of the 27 countries in the EU decides you are breaking one of their laws, they can have 1 of the other 26 enforce an EIO.