What is wrong with reviewing cases? I don't see the issue.
The reason it's being spoken about is because of the 4 recent cases which were mishandled by the police and / or CPS. If cases have been mishandled then we should look at why. If it's likely or possible that there have been miscarriages of justice then they must be reviewed. Your suggestion that we should ignore potentially innocent men being found guilty of rape is disgusting.
"If a few cases of burglary or murder collapsed then would they would review all cases ever for those crimes. I think not."
You can't really bases this on "think" though, can you. Facts are better. There was a debate last week with Senior MPs calling to review outdated murder laws saying that dozens and dozens of cases need to be reviewed - they've been used for unfair convictions.