What I would see useful, and would happily go through myself, is to have a required training exercise before you can make edits. Especially knowing the thought of moving towards a Wikipedia style of editing. It might work like this...
You are given a release to add, from a list that already has good confirmed data. You are given the name / artist / medium type / etc. You are to look on Google / Bing / etc and locate at least one acceptable source, like iTunes, Amazon, AllMusic/AllData, Discogs, etc. Then, you are to add this release per that reference. This simulated add is then compared to the verified existing data. The user is them presented with a report of how they did, and pass or fail.
There could even be those who could respond to users, both that pass and fail, to help them understand the procedure. Honestly, I would have loved this when I started. I spent a lot of time fixing my own mistakes and getting frustrated at others. A few editors did this on their own for me and my edits and I find that most valuable.
Thoughts from the group? Is this even a possibility or something that would not even be considered? It can be left at just an approval process, or you could even have members certified for skillsets.