Barring any attempts to hinder a police investigation or crime scene, the right to record law passed in NY should be absolute.
I see no reason why it's a bad thing to keep law enforcement honest and make sure their actions are legal and above board....because otherwise, their mistakes and ignorance of the law can cost the public money.
It also allows the good folks within police departments to have a straightforward way to root out the bad folks and the corruption that a police union might traditionally try to cover up. If I were a cop and I knew one of my coworkers was a bad apple, and might screw things up for me, knowing that they are getting recorded on the job would give me peace of mind.