I think if a person made a complaint to law enforcement, they could get a waiver - or maybe even a court order - to record a specific person for a specific time for a specific reason. Maybe that should be easier, but I don't think the process should be any less regulated.
The whole point is that you should be able to record now, and handle any permission/admissability later; and you shouldn't require cooperation of government beforehand - it's likely for police or court to say that your case is not important enough for them; but it's not a valid reason to restrict your ability to protect yourself.
What you intentionally say to me isn't your private secret anymore - if I had the right to hear it, then I have the right to remember it and to repeat that to any court; and I should have the right to remember it perfectly&permanently on a durable medium, and hand at to any court as valid evidence. In short, it makes sense to require permission of a participant in recorded conversation, but not all participants.
Historically, recording/taping conversations was a "spec-ops" act against someone, which could be only used by those in power to abuse/blackmail people, and it made sense to restrict it.
Nowadays, recording devices are ubiquitous, and easily available even to, say, poor disadvantaged teenagers, and the majority of their use actually seems to be for the "little guy" to protect against abuse by obtaining evidence of it. IMHO we should consider a way (details, conditions, restrictions, etc) to make it generally legal to make recordings of things that are said to you or done to you.